The former president faces 78 felony charges across three criminal cases. However, it is unlikely Trump will receive the maximum sentence for any charge and it is highly likely that he'd serve multiple sentences at the same time.

Here are the charges against the former president in each case and their maximum sentences:

Efforts to overturn the 2020 election:

• Two counts of obstructing an official proceeding, each carrying a maximum sentence of 20 years in prison.
• 1 count of conspiracy against the right to vote, carrying a maximum sentence of 10 years in prison.
• 1 count of defrauding the U.S., carrying a maximum sentence of 5 years in prison.

Alleged mishandling of classified documents:

• 32 counts of willful retention of national secrets, each carrying a maximum sentence of 10 years in prison.
• 6 counts of obstruction of justice, each carrying a maximum sentence of 20 years in prison.
• 2 counts of false statements, each carrying a maximum sentence of five years in prison.

Alleged hush money payment to a porn star:

• 34 counts of falsifying business records, each carrying a maximum sentence of four years in prison.

Trump arrived at the E. Barrett Prettyman Courthouse.

He is scheduled to appear before Magistrate Judge Moxila Upadhyaya at around 4 p.m. ET.

Top officials at the U.S. Capitol Police began having meetings weeks ago about the possibility of a Trump indictment and what it would mean for security.

“It is part of the new way the USCP plans early for the possibility of anything significant near Capitol Hill,” a spokesperson said yesterday.

Special counsel Jack Smith's motorcade left his office in D.C. around 2:45 p.m. and is expected to arrive at the courthouse within minutes.

Trump exited the plane, appearing to mouth "thank you" to someone.

He entered a car and his motorcade departed just after 3 p.m. ET.

The courtroom where Trump will be arraigned features four rows of seating, with pews on either side of the doorway.

Facing the judge, federal prosecutors will be seated at the table to the right, and the defense will be seated on the left side.

Journalists, including NBC's Garrett Haake, are currently seated in the back two rows, closest to the door. He is among only 11 reporters with access to the courtroom, which was determined by lottery.

Unidentifiable men and women in suits are seated in the front row.

A man wearing a U.S. Marshals Service jacket is standing in the courtroom.

Trump's plane landed at Reagan National Airport (DCA) moments ago.

His flight took less than an hour.

The four-count indictment criminally charging Trump with trying to overturn the 2020 presidential election and subvert lawful votes is the result of months of investigating Trump, including testimony from allies, aides and officials all the way up to former Vice President Mike Pence.

Although the third indictment of Trump, the new charges are likely to land with a more complicated political thud, marking the first time the U.S. criminal justice system has sought to punish a leader for actions regarding the transfer of power.

Read the full story here.

On the day Trump is to report to federal court, one of the people who served as an elector for him in Pennsylvania said he never would have signed certification purporting he was an elector without caveat language that his slate would only go into effect if the state’s election results were overturned.

The so-called fake electors in five other states — Arizona, Georgia, Michigan, Nevada and Wisconsin — did sign certification without such caveat language. Federal authorities charged that Trump was the head of a scheme that attempted to overturn the 2020 election and the Trump elector plan was a central part of the indictment.

“I would not have signed any documents if it weren’t for that language,” Pennsylvania Trump elector Charlie Gerow told NBC News today. “In my judgment, that would have been over the line. I would not have to hold myself forth in such a way.”

Central to the plan, authorities say, were slates of pro-Trump electors in seven states that Joe Biden won. In most of the states, these Republicans signed certification purporting to be the rightful electors and that their votes should count, even though Trump had lost in their states. Many of these electors have been subpoenaed and at least four have been called to the special grand jury, NBC News has previously reported.

But electors in both Pennsylvania and New Mexico inserted special language before signing their certificates, noting their votes were to be counted only if the election results in their states were overturned. According to the indictment, “A Campaign official cautioned not to offer the conditional language to other states because ‘[t]he other States are signing what he prepared — if it gets out we changed the language for PA it could snowball.’”

Despite highlighting the importance of that caveat language, Gerow still has significant issues with the latest indictment against Trump.

“It’s another imaginative writing of an indictment,” he said. “It’s an affront on the First Amendment. It should frighten every American regardless of their political persuasion. I see these continued specious criminal charges as an affront to democracy.”