Trump is set to appear in federal court in Miami on Tuesday.
To read live updates from Tuesday's court appearance, click here.
Former President Donald Trump has been indicted on federal charges in an investigation into his handling of classified documents, according to an indictment unsealed on Friday.
The indictment comes after more than 100 documents with classified markings were found at Trump's Mar-a-Lago resort in August 2022.
Trump was charged with 37 counts: 31 counts of willful retention of national defense information; one count of conspiracy to obstruct justice; one count of withholding a document or record; one count of corruptly concealing a document or record; one count of concealing a document in a federal investigation; one count of scheme to conceal; and one count of false statements and representations.
The indictment of Trump, who has repeatedly denied any allegations of impropriety, is unprecedented for a former president.
House Speaker Kevin McCarthy called news of Trump's federal indictment "unconscionable" and said House Republicans will "hold this brazen weaponization of power accountable."
The speaker is the first of the Big Four to comment on Trump's second indictment.
-ABC News' Lauren Peller
With former President Donald Trump now facing a second indictment, this time on federal charges, according to sources, it's a turn of events that could shake up the Republican primary field as Trump makes a third run for the White House.
The aftermath of Trump's first indictment in New York connection to an alleged hush money scheme could be an indication of what is to come. Before his first indictment, Trump pledged to continue on with his presidential bid despite charges and even argued that cases could give his campaign a boost. Trump wasn't wrong.
In fact, he still outpaces his GOP rivals in recent polling.
Another boon to his campaign, the fact that Republicans by and large rallied around him after his first indictment -- even most of those challenging him in the Republican presidential primary.
But the field of candidates is more crowded now, comprised of more candidates willing to clearly criticize Trump.
Read more of ABC News' analysis here.
-ABC News' Averi Harper
The federal indictment against former President Donald Trump is expected to be a "speaking indictment" that will lay out chapter and verse the government's case to the public, according to sources.
Read more about what an indictment means here.
-ABC News' Ivan Pereira
Former President Donald Trump's team has been anticipating a federal indictment for the past several days, sources said.
Sources said his team is already planning a trip down to Miami and is thinking of holding a campaign event around this indictment.
-ABC News' John Santucci
