Former President Donald Trump traveled to Nebraska Sunday to rally supporters around his pick for governor, businessman Charles Herbster, who is also facing multiple groping allegations (which Herbster has denied). But Trump didn’t just focus on Herbster’s race in his 104-minute speech, NBC News’ Vaughn Hillyard reports.

Trump flubbed J.D. Vance’s name, Trump’s preferred candidate in Ohio’s Senate race, instead calling him “J.D. Mandel,” an apparent mix-up with another candidate, state Treasurer Josh Mandel. (“We've endorsed J.P., right—J.D. Mandel,” Trump said.)

He also praised Missouri GOP Rep. Billy Long as Long continues to vie for Trump’s endorsement in the Show Me State’s Senate race.

And Trump criticized a series of other sitting Republicans, including Nebraska’s own Sen. Ben Sasse and Rep. Don Bacon, saying he would not endorse Bacon or Bacon’s primary challenger ahead of the May 10 primary. But he added that Bacon is a “bad guy” and wished his primary challenger “good luck.”

Elsewhere on the campaign trail:

Arizona Senate: Politico reports that state Attorney General Mark Brnovich appears to have lost his lead in the GOP Senate primary as other candidates in the race hit the airwaves.

Colorado Governor: Danielle Neuschwanger, who fell just short of the votes needed at the state GOP convention to qualify for the Republican primary ballot, will run a third-party candidacy.

Georgia Governor: Early voting starts today in Georgia ahead of the May 24 primary. GOP Gov. Brian Kemp and former Sen. David Perdue met again on the debate stage Sunday. Trump is holding a tele-rally for Perdue tonight.

Wisconsin Governor: Republican businessman Tim Michels booked another $117,000 in ad spending for this week as he rolls out his new gubernatorial bid.

Florida-27: Miami City Commissioner Ken Russell is ending his Democratic Senate bid to run for Congress against GOP Rep. Maria Elvira Salazar

Just over one week ahead from West Virginia's primary election, a familiar face is backing Rep. David McKinley, R-W. Va., on the airwaves. Sen. Joe Manchin, D-W. Va., is featured in a new ad supporting McKinley in his primary election.

Due to population loss, West Virginia was forced to downsize from three congressional districts to just two, leading McKinley to face another incumbent congressman, Rep. Alex Mooney, R-W. Va., in a primary.

Mooney is endorsed by former President Donald Trump.

Manchin opens the ad by highlighting the failure of Build Back Better, a tenet of President Joe Biden's agenda that failed in part due to Manchin's opposition of the plan. 

"I've always said if I can't go home and explain it, I can't vote for it, and that's why I opposed Build Back Better," Manchin says at the beginning of the ad.

"For Alex Mooney and his out of state supporters to suggest David McKinley supported Build Back Better is an outright lie," he adds. "David McKinley has always opposed reckless spending because it doesn't make sense for West Virginia."

Manchin isn't the first high profile West Virginian to support McKinley on the airwaves. Republican Gov. Jim Justice has also been featured in ads promoting McKinley.

Mooney and McKinley have been locked in an intense, months-long ad war as the two head to a primary on May 10. The non-partisan Cook Political Report rates this district as Solid Republican, meaning whoever wins the primary is likely to keep the seat in November's general election. 

A new AIPAC-backed super PAC is spending big in Democratic congressional primaries. United Democracy Project is running a combined $1.6 million in four races — one in Pennsylvania, another in Texas and two in North Carolina.

In Pennsylvania, UDP has spent $472,000 so far in ads opposing state Rep. Summer Lee, a progressive candidate backed by Justice Democrats, the same group who backed Rep. Alexandria Ocasio-Cortez’s, D-N.Y., first run for Congress. Lee is seeking the Democratic nomination for Pennsylvania’s 12th district. Rep. Fred Keller, R-Penn., decided not to run again after the district became more Democratic following redistricting.

The UDP ads against Summer Lee feature a narrator who attacks her for not supporting Biden. 

“Summer Lee attacked Biden's character, said he'd take us backwards and Lee refused to support Biden's infrastructure plan that's now rebuilding bridges and roads in Western Pennsylvania,” the ad's narrator says.

"Summer Lee, more interested in fighting Democrats than getting results,” the ad intones.

In Texas’ 28th district, where progressive Jessica Cisneros is facing Congressman Henry Cuellar, D-Texas, in a runoff primary at the end of May, UDP has spent $128,000 so far running ads against Cisneros.

The ad’s narrator tells viewers, “Jessica Cisneros would cost us thousands of jobs in south Texas,” pointing to her plan to cut the number of border patrol agents and reassign them to other functions.

“Jessica Cisneros is backed by groups who want to cut police funding, too, costing us even more jobs. Jessica Cisneros: a risk to our jobs, and our safety,” the narrator adds.

In North Carolina, UDP is running positive ads, supporting state Sen. Don Davis in the state’s first district and state Sen. Valerie Foushee in the state’s 4th district. Foushee faces seven other candidates in the Democratic primary for retiring Rep. David Price’s, D-N.C., seat. 

The group has already spent over $577,000 on ads supporting Foushee.

The ads in her favor highlight her life story and her time in the state Senate, “where she stood with Roy Cooper to improve education, stop Republican attacks on voting rights and protect a woman's right to choose,” the ad’s narrator says.

Davis is running for retiring Rep. G.K. Butterfield’s seat and the ads in his favor highlight his life story and his record in the state Senate.

“Davis voted to raise teacher pay, invest in maternal health, and when Republicans tried to gut Medicaid, Don Davis took them on,” the ad’s narrator says.

UDP has spent $444,000 on ads supporting Davis so far.

UPDATED 4:20 p.m. | Former President Donald Trump is heading to Nebraska on Sunday to boost his preferred candidate for governor, businessman Charles Herbster. And the rally comes as the race has heated up on the airwaves. 

Herbster, who is expected to speak at the rally, faces a crowded field of candidates, including Jim Pillen, a businessman and livestock producer, and state Sen. Brian Lindstrom. Those three candidates have outspent the rest of the field on the airwaves, spending a combined $11.1 million on ads, per the ad tracking firm AdImpact. 

Trump’s rally also comes as Herbster is facing sexual misconduct allegations, with eight women, including a state senator, accusing him of groping, according to a report in the Nebraska Examiner.

Herbster has denied the allegations and launched a TV ad accusing his Pillen and GOP Gov. Pete Ricketts, who has backed Pillen in the race, of conspiring to lie about Herbster. The ad compares Herbster to Supreme Court Justices Brett Kavanaugh and Clarence Thomas, who respectively faced allegations of sexual assault and sexual harassment. 

Herbster’s campaign has outspent his opponents on the airwaves, spending $5.2 million as of Friday. Pillen has spent $4.3 million on ads, while Lindstrom has spent $1.5 million. One outside group known as Conservative Nebraska has spent $848,000 on anti-Herbster ads. Another outside group known as Restore the Good Life has spent $510,000 to boost Marine veteran Michael Connely. 

Whoever wins the GOP primary on May 10 is expected to win the general election. Trump won the Cornhusker State by 19 percentage points in 2020 and the Cook Political Report rates the Nebraska governor’s race Solid Republican.

This post has been updated to reflect that Trump postponed his rally from Friday to Sunday due to inclement weather.

With the Ohio primary just four days away, outside groups are hitting the airwaves in the competitive GOP Senate contest. Protect Ohio Values, the Peter Thiel-backed super PAC supporting author J.D. Vance, is running a new spot attacking former Treasurer Josh Mandel as a “moderate,”noting his endorsement of 2012 Republican presidential nominee Mitt Romney.  

Meanwhile, Drain the DC Swamp PAC has a new ad supporting Mandel, spanning a range of issues including Mandel’s support for the controversial Arizona audit of the 2020 election. Ohio Leads, a super PAC backing former state GOP Chairwoman Jane Timken, is up with a new spot highlighting Vance’s anti-Trump comments.   

Sen. Josh Hawley, R-Mo., will hit the campaign trail for Vance on Sunday and Monday, along with Turning Point Action founder Charlie Kirk. And investment banker Mike Gibbons is hosting a tele-town hall on Monday with Sen. Rand Paul, R-Ky., and Rep. Kat Cammack, R-Fla. 

Elsewhere on the trail ... 

GA-SEN: Republican Kelvin King is running his first television ad, a bio spot that criticizes incumbent Sen. Raphael Warnock on inflation.   

OK-SEN: GOP Sen. James Lankford is putting $312,000 behind a new ad buy that spans virtually all of June ahead of the state’s June 28 primary, per AdImpact.  

AZ-GOV: Democrat Aaron Lieberman’s first TV ad takes aim not just at GOP gubernatorial hopeful Kari Lake, but also Democratic frontrunner Katie Hobbs, criticizing her over an employment discrimination case.  

HI-GOV: Punchbowl is reporting that Hawaii Democratic Rep. Kai Kahele is leaving Congress to run for governor.  

GA-GOV: Republican Gov. Brian Kemp signed a handful of controversial education bills into law Thursday.  

MD-GOV: Fox 45 in Baltimore has a new story noting other times when Democrat Wes Moore did not correct interviewers who misrepresented his biography. The good news for Moore: House Majority Leader Steny Hoyer is endorsing him.  

IL-5: Democratic Rep. Mike Quigley says he won’t run for mayor of Chicago.  

Read more in today's First Read, the daily briefing from "Meet the Press" and the NBC Political Unit on the day's most important political stories and why they matter.

Sign up for First Read here. 

The First Read number of the day is two, the number of times that President Biden and Vice President Harris have had private lunches this year. 

That’s a significant decrease from the 21 times the two lunched in 2021, after Biden said he wanted to forge a similar relationship with his second-in-command as then-President Obama forged with him over regular, private lunches.  

At this point during Biden's second year as vice president, he had 13 private lunches with Obama. 

When asked about the infrequency of their lunches, Deputy White House Press Secretary Chris Meagher said: “The president and vice president are in constant touch with each other, and he relies on her counsel, partnership, and friendship as they work together to continue to grow the economy, cut costs for working families, rally the world in the face of Russia’s aggression, and make historic investments in our nation’s infrastructure.”

Both Biden and Harris have had separate overseas trips this year while also ramping up their domestic travel schedules. Harris also worked remotely for a period in mid-March after her husband, Douglas Emhoff, tested positive for COVID. 

But Biden and Harris’ schedules overlapped often this year, with joint public or private events on 39 days, making the absence of weekly lunches more conspicuous. 

Biden has had other private lunches as well this year, including one for old time’s sake with Obama. Harris later joined them for a public event about expanding the Affordable Care Act.

Read more in today's First Read, the daily briefing from "Meet the Press" and the NBC Political Unit on the day's most important political stories and why they matter.

Sign up for First Read here. 

Florida Republican Gov. Ron DeSantis traveled to Nevada to campaign for GOP Senate candidate Adam Laxalt Wednesday night and provided some material for the 2024 speculation surrounding the governor. Watch the "MTP Daily" report: 

Former President Donald Trump has endorsed Clark County Sheriff Joe Lombardo in the crowded GOP primary to take on Nevada’s Democratic Gov. Steve Sisolak. 

“As Governor, Joe will fiercely Protect our under-siege Second Amendment, Oppose Sanctuary Cities, Support our Law Enforcement, Veto any Liberal Tax Increase, Protect Life, and Secure our Elections,” Trump said in a Thursday night statement.

The GOP primary, which is set for June 14, also features North Vegas Mayor John Lee, venture capitalist Guy Nohra, and former Sen. Dean Heller, who Trump supported in 2018 after pressuring Heller to vote to repeal the 2010 health care law. Heller lost re-election that year by 5 percentage points.

In statements to the Las Vegas Sun, Lee said Trump “made the wrong decision” while Nohra said he would “work hard to earn every vote as I have promised." Heller’s campaign manager Jack Finn said Trump’s endorsement is “not going to change our approach one bit.” 

Democrats used Trump’s decision to weigh in on the race as an opportunity to blast Lombardo. 

“After months of flailing on the campaign trail and getting pummeled on the airwaves by his opponents, Joe Lombardo’s campaign is on life support and desperately called on the one person he claimed he wouldn't seek out,” Nevada Democratic Victory spokesperson Mallory Payne said in a statement. Payne was referring to Lombardo’s pushback on reporters’ questioning whether he would seek Trump’s endorsement. 

Nevada is a top target for Republicans in November. President Joe Biden carried the state by just 2 points in 2020 after Hillary Clinton won the Silver State by the same margin in 2016.

A super PAC backing former Ohio Treasurer Josh Mandel is up with a new ad criticizing author J.D. Vance as "weak" on Ukraine because of past comments about his ambivalence to the war's outcome. 

The ad quotes Vance saying "I gotta be honest with you, I don't really care what happens to Ukraine one way or another." The spot goes on to call Vance's comments "music to Putin's ears," evoking the state's Ukrainian population. 

"Wrote a book trashing Ohioans as hillbillies, then sold his story to Hollywood. J.D. Vance, liberal elite, not for Ohio," the ad ends. 

The clip comes from an interview with Steve Bannon, who was previously a top aide to former President Donald Trump. In it, Vance added that "I do care about the fact that in my community right now the leading cause of death among 18-45 year olds is Mexican fentanyl that’s coming across the southern border.”

Vance subsequently put out a statement calling "Russia’s assault on Ukraine is unquestionably a tragedy," and saying that America "must avoid blundering our way into the conflict there."

But the Republican's primary opponents have used Vance's comments against him — state Sen. Matt Dolan wrote in a subsequent op-ed that "The misguided and shameful notion that we, as Ohioans and Americans, shouldn’t care about what happens in Ukraine is wrong."

A new poll of Wisconsin's Senate Democratic primary shows two candidates at the top of the field — Lt. Gov. Mandela Barnes and Milwaukee Bucks executive Alex Lasry — but almost a majority of likely Democratic primary voters unsure of who they support. 

Marquette University's poll found Barnes with support from 19 percent, with Lasry close behind at 16. State Treasurer Sarah Godlewski is at 7 percent and Outagamie County Executive Tom Nelson with 5 percent. The margin of error for the poll, conducted between April 19-24 of 363 likely primary voters, is 6.6 percent. 

The results represent a downtick in support for Barnes since Marquette's February poll — down from 23 percent. Lasry has seen a slight improvement from 13 percent in April, and Godlewski's support grew from 3 percent to 7 percent. 

Lasry has spent markedly more than the the rest of the field on advertising: $5.6 million, per AdImpact. Godelwski has spent $1.6 million, while Barnes has spent just $94,000. 

In the other big primary in the state, former Lt. Gov. Rebecca Kleefisch leads the GOP gubernatorial primary with 32 percent, with military veteran Kevin Nicholson at 10 percent and state Assemblyman Tim Ramthun at 5 percent. 

As far as voter enthusiasm ahead of November, Republicans and Democrats had similar levels of enthusiasm. Eighty-one percent of Republicans and 84 percent of Democrats said they were either very or somewhat enthusiastic to vote in November.