Tonight's State of the Union has had a number of outbursts from Republicans, one from Rep. Marjorie Taylor Greene, R-Ga., who yelled, "Liar!"

When Biden spoke about immigration, some Republicans yelled, “Secure the border!” And as Biden talked about international affairs, Greene shouted, “China spied on us!”

Such outbursts during presidential speeches to Congress are relatively rare. Perhaps the most famous one happened in 2009, when Rep. Joe Wilson, R-S.C., shouted, "You lie!" during then-President Barack Obama's health care speech.

The House then voted 240 to 179 to rebuke Wilson, saying he committed a "breach of decorum and degraded the proceedings of the joint session, to the discredit of the House.” Seven Republicans joined Democrats in voting for the resolution, while 12 Democrats opposed.

Wilson also apologized to Obama for his outburst.

It's not clear whether the GOP lawmakers at tonight's speech will face any similar criticism, although House Speaker Kevin McCarthy, R-Calif., tried to shush his Republican members several times.

The president said "democracy has been threatened and attacked, put at risk" in the last few years, put to the test on Jan. 6, 2021, in the very room where he was speaking.

"Then, just a few months ago, unhinged by the big lie, an assailant unleashed political violence in the home of the then-speaker of this House of Representatives using the very same language that insurrectionists who stalked these halls chanted on Jan. 6," he said.

He continued: "Tonight in this chamber is the man who bears the scars of that brutal attack but is as tough and strong and as resilient as they get. My friend, Paul Pelosi."

Pelosi, a guest of the first lady, stood up in the gallery, wearing a hat that he has worn in public since the brutal attack on him last year. His wife, former Speaker Nancy Pelosi, stood up and applauded her husband and waved to him.

Biden said there is "no place for political violence in America."

“Some Republicans want Medicare and Social Security to sunset — I’m not saying it’s a majority,” Biden said Tuesday, prompting boos from many Republicans. “Anybody who doubts it, I’ll give you a copy of the proposal.”

While a proposal may exist, GOP lawmakers are not on board with it.

Biden appeared to be referring Sen. Rick Scott’s “An 11 Point Plan to Rescue America,” which suggested sunsetting all federal legislation in five years. “If a law is worth keeping, Congress can pass it again,” the document reads. To sunset a law means to create an automatic expiration date for that program or agency, one that can be renewed only with new legislation.

Republicans have distanced themselves from this aspect of Scott’s plan, with Senate Minority Leader Mitch McConnell, R-Ky., explicitly rejecting it.

Scott, R-Fla., released his plan a year ago as chair of the Senate GOP campaign arm but later said he didn’t want to end those programs, just reform them. Still, he’s running for re-election, and the plan is on his campaign website.

Biden addressed the threat China poses to America but did not explicitly mention the alleged surveillance balloon the U.S. military shot down over the weekend.

The president said investing in American innovation is important to compete with China, which he said is intent on dominating industries that define the future.

"Today, we’re in the strongest position in decades to compete with China or anyone else in the world," he said. "I am committed to work with China where we can advance American interests and benefit the world."

He added: "But make no mistake about it. As we made clear last week, if China threatens our sovereignty, we will act to protect our country, and we did."

The full chamber stood to applaud when Biden acknowledged the parents of Tyre Nichols, who are seated in the gallery by first lady Jill Biden. 

Several Republicans stood to clap when Biden spoke about making sure police are held accountable, including Reps. Marcus Molinaro and Nicholas LaLota of New York. 

Sen. Tim Scott, R-S.C., was quick to his feet as Biden said, “Something good must come from this.” 

Rep. Brian Fitzpatrick of Pennsylvania appears to be the Republican who has stood to clap the most during Biden’s speech. He stood to applaud when Biden called for banning so-called assault weapons, joining Democrats in a standing ovation. 

The president urged Congress to pass the Equality Act to allow LGBTQ Americans to live with “safety and dignity," specifically calling for protections for transgender young people.

Transgender people have become targeted by conservatives across the country, with more than 100 bills targeting LGBTQ rights having been filed in 22 state legislatures so far this year. Advocates expect this year will break the record for anti-LGBTQ legislation introduced in statehouses.

In the past three years, 18 states have banned transgender student-athletes from competing on school sports teams that align with their gender identities instead of the sexes they were assigned at birth, according to the Movement Advancement Project, an LGBTQ rights think tank. Four states have also restricted gender-affirming medical care for minors, although federal judges have blocked some of the bans from taking effect. 

“While virus is not gone, thanks to the resilience of the American people and the ingenuity of medicine, we’ve broken the Covid grip on us,” Biden said.

The White House announced Jan. 30 that it will let the national and public health emergencies related to the pandemic expire May 11.

Biden highlighted the plan Tuesday, saying: "We’ve saved millions of lives and opened our country back up. And soon we’ll end the public health emergency."

Around 524 people are dying of Covid a day on average, according to NBC News' tally. That's far lower than last winter but still higher than the pandemic low in July 2021, when fewer than 200 people died per day on average.

Once the emergency ends, so will some federal rules that eased consumer costs — for example, the requirement that insurance companies cover eight at-home Covid tests a month. 

Biden said the U.S. must continue to monitor variants and provide federal funding for vaccines and treatments.

"We will remember the toll and pain that's never going to go away," he added. "More than a million Americans lost their lives to Covid. A million. Families grieving. Children orphaned. Empty chairs at the dining room table constantly reminding you that she used to sit there."

Biden praised the hero who disarmed a mass shooter at a packed dance call in Monterey Park., Calif., last month, ending by urging lawmakers to "ban assault weapons now."

Drawing attention to Brandon Tsay, 26, who attended Tuesday’s speech as a guest of the president, Biden described his heroics during the shooting.

“Two weeks ago, during Lunar New Year celebrations, he heard the studio’s front door close and saw a man pointing a gun at him,” Biden said. “He thought he was going to die, but then he thought about the people inside.

“In that instant, he found the courage to act and wrestled the semi-automatic pistol away from a gunman who had already killed 11 people at another dance studio,” Biden continued. “He saved lives. It’s time we do the same as well.”

Last month, 11 people died after a gunman opened fire at a packed dance hall. Tsay, whose family owned the dance hall, wrestled the gun away from the shooter, preventing further bloodshed.

A lawmaker close to an interaction between Sen. Mitt Romney, R-Utah, and Rep. George Santos, R-N.Y., told NBC News about having overheard an awkward moment between the two members that went viral on social media.

During the back-and-forth, Romney told Santos that he does not belong in Congress, said the member who witnessed the moment.