How are Republicans reacting?
Donald Trump still has strong support among the Republican party, and polling suggests he remains the clear frontrunner for the presidential nomination despite his triple indictment.
We haven't yet heard from two senior Republican figures: senate minority leader Mitch McConnell, and senate minority whip John Thune.
Nothing from Donald Trump's main rival for the Republican nomination, Florida governor Ron DeSantis. But another rival has weighed in.
Nikki Haley served as UN ambassador for most of Trump's presidency, and enjoyed relatively good relations while he was in the White House.
She's running against Trump, but urged the country to move on from his indictments.
"Like most Americans, I'm tired of commenting on every Trump drama," she said in a radio interview.
"I've lost track of whether this indictment is the third or fourth or fifth.
Ms Haley said that while Trump "bears some responsibility for what happened" on January 6, "it鈥檚 not a crime to say you think an election was stolen. He should not be prosecuted for that."
Texas senator Ted Cruz ran against Barack Obama for the presidency in 2012. To say he's had a complicated relationship with President Trump is an understatement.
He's previously called Trump a "snivelling coward" and "utterly amoral".
But he's given Trump his backing on Twitter earlier today, subtly accusing the US justice department of being the "legal arm" of the Democratic party.
"This isn't impartiality; it's partisanship," he wrote.
Former Florida governor Rick Scott is running for reelection to the US Senate next year. He has tweeted a graphic from Fox News, comparing dates in the Hunter Biden investigation with the dates Trump has been indicted.
鈥淓very time we learn more about potential Biden family corruption, Joe Biden's DOJ [department of justice] indicts his top political opponent," he tweeted.
One of Trump's most steadfast defenders in Washington is Elise Stefanik from the state of New York.
While Trump was in the courtroom, she said: "The American people are smart, and they know this is a politically charged witch hunt orchestrated by Joe Biden鈥檚 corrupt DOJ.
"The unconstitutional and unprecedented arrest of President Donald J. Trump is truly a chilling chapter in Joe Biden's weaponization of the Department of Justice against his leading political opponent."
Representative Marjorie Taylor Greene is another core Trump ally, widely accused of peddling conspiracy theories.
As Trump made his way back to the airport, she said what she calls the "Deep State" is after the former president.
"Joe Biden and his DOJ are conducting the most corrupt election interference campaign we鈥檝e ever seen," she said.