Trump indictment updates: Trump speaks out on charges from Mar-a-Lago

Former President Donald Trump has departed Florida's Palm Beach International Airport bound for New York City.

Dozens of Trump supporters lined the streets to cheer the former president on as his motorcade headed to the airport.

Some wore shirts saying, "Trump did nothing wrong."

"People want to support [Trump] because, basically, they see him as an underdog at this point, and which he is," Whit Taylor told ABC News as he watched the motorcade. "He’s being harassed and pushed around by people who are just haters. I mean that’s the bottom line -- they just hate people."

Trump is expected to stay in Manhattan Monday night before appearing in court for an arraignment on Tuesday.

As New York City gears up for former President Donald Trump's arraignment on Tuesday, Mayor Eric Adams said "there has been no specific credible threat."

"All New Yorkers should go on with their regular activities" on Tuesday, Adams said at a news conference Monday, adding that New Yorkers should expect "some disruptions," including traffic and street closures.

New Yorkers may also see an additional police presence, NYPD Commissioner Keechant Sewell said. She encouraged people to use mass transit when possible.

Sewell said any protests should be peaceful and orderly.

The mayor warned that violence and vandalism won't be tolerated, and said anyone caught participating in violence will be arrested.

Adams called out Rep. Marjorie Taylor Greene, R-Ga., who said she's planning to come to New York to support Trump, urging her and others to "be on your best behavior."

A plurality of Americans think former President Donald Trump should have been charged by a Manhattan grand jury with a history-making indictment.

According to the poll, 45% think Trump should have been charged with a crime in this case, whereas 32% don't think so and 23% say they don't know.

Democrats are, unsurprisingly, rallying behind the grand jury's decision.

Almost nine in 10 Democrats (88%) think Trump should have been charged in the investigation by the Manhattan D.A., which has been probing a $130,000 hush money payment made to adult film actress Stormy Daniels who alleges the two had an affair. Trump has long denied these claims.

-ABC News’ Brittany Shepherd

Donald Trump's lawyer doesn't know what to expect when the former president is arraigned on Tuesday in New York City given the historic nature of Trump's indictment, he said on Sunday.

"This is unprecedented. I don't know. I've done a million arraignments in that courthouse with celebrities and whatnot. But this is a whole different thing. We have Secret Service involved. I understand they're closing the courthouse for the afternoon. I just don't know what to expect to see," Joe Tacopina told ABC "This Week" anchor George Stephanopoulos.

"What I hope is that we get in and out of there as quickly as possible, that it's, at the end of the day, a typical arraignment where we stand before the judge, we say 'not guilty,' we set schedules to file motions and whatnot or discovery, and we move forward and get out of there," Tacopina said.

-ABC News’ Tal Axelrod