Trump says he'll plead not guilty after federal indictment

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.

Christie says facts in Trump indictment are 'devastating'

Former New Jersey Gov. Chris Christie addressed the federal indictment against former President Donald Trump and declared that it was "devastating," in an interview Friday with CNN.

Christie, who announced his candidacy this week for president, called it a "very, very evidence-filled indictment" and the facts contained within it "devastating" for Trump.

Christie reiterated that he believed Trump engaged in behavior that was "irresponsible."

Christie also disagreed with some Republicans like Speaker Kevin McCarthy who have warned about the disruption the indictment could cause, saying that Trump's wounds were "self-inflicted" and that he could have avoided this by simply returning the documents.

"He has contributed mightily to subjecting the country to the pain that we're going to go through over the course of the next number of months because of what's going on," Christie said.

-ABC News' Nicholas Kerr

Secret Service, Marshals preparing for Trump court appearance

The U.S. Secret Service is preparing for Trump's initial appearance in federal court in Miami on Tuesday as he faces 37 felony counts in a sweeping indictment.

In coordination with the U.S. Marshals and local law enforcement authorities, the Secret Service is working to streamline Trump's movements and minimize the number or locations and the distance he needs to move within the court complex to help secure his appearance.

"While operational security precludes us from going into specifics, the Secret Service will not seek any special accommodations outside of what would be required to ensure the former Presidents continued safety," Secret Service spokesman Anthony Guglielmi said in a statement.

A U.S. Marshal spokesperson said that "ensuring that judges can rule independently and free from harm or intimidation is paramount to the rule of law, and a fundamental mission of the USMS."

-ABC News Jack Date

GOP Rep. calls for an 'eye for an eye'

Following the unsealing of Trump's indictment, GOP lawmakers continued reacting to the news this afternoon and one included an incendiary remark.

"We have now reached a war phase. Eye for an eye," Rep. Andy Biggs, a Freedom Caucus member and top Trump ally, tweeted.

Another Trump ally, Rep. Clay Higgins, tweeted that "President Trump said he has "been summoned to appear at the Federal Courthouse in Miami on Tuesday, at 3 PM. This is a perimeter probe from the oppressors. Hold. rPOTUS has this. Buckle up. 1/50K know your bridges. Rock steady calm. That is all."

-ABC News' Gabe Ferris

Schumer, Jeffries release joint statement

Senate Majority Leader Chuck Schumer and House Democratic Leader Hakeem Jeffries said in a joint statement Friday, "No one is above the law – including Donald Trump."

"This indictment must now play out through the legal process, without any outside political or ideological interference," they said. "We encourage Mr. Trump’s supporters and critics alike to let this case proceed peacefully in court.”