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

About 50 to 60 Trump supporters have already gathered in West Palm Beach ahead of the former president's speech tonight at Mar-a-Lago.

The crowd has been peaceful, though police said they are ready for anything. Barricades have been put in place for the safety of the supporters and drivers.

Hundreds of supporters are expected to attend, the Trump campaign said.

Longtime Trump adviser Roger Stone and MyPillow’s Mike Lindell will be among those in attendance, the campaign told ABC News. Georgia Rep. Marjorie Taylor Greene and Florida Rep. Matt Gaetz are also planning to attend, ABC News previously reported.

-ABC News' Victor Oquendo, Rachel DeLima, Will Steakin, Rachel Scott and Lalee Ibssa

Lawmakers and political leaders are reacting to Tuesday's historic arraignment of and unveiled indictment against former President Donald Trump.

As Republicans slammed the "travesty" of Trump's arraignment, Democrats' messaging centered on support for the "justice system."

Meanwhile, some of the now-exonerated "Central Park Five" -- five Black and brown boys wrongfully accused of rape and assault in New York City -- say the former president's indictment is "karma." Trump had called for the return of the death penalty in a series of ads in 1989 amid the case.

In his first post on social media since his arraignment, former President Donald Trump called the hearing "shocking" that there were "no surprises" and "no case."

Trump also promoted his upcoming speech tonight at Mar-a-Lago on his social media platform.

"Just lifted off for Palm Beach, Florida. Will be delivering remarks tonight at Mar-a-Lago at 8:15 P.M., EASTERN. The hearing was shocking to many in that they had no 'surprises,' and therefore, no case. Virtually every legal pundit has said that there is no case here. There was nothing done illegally!" Trump wrote.

-ABC News' Will Steakin

ABC News asked legal experts their thoughts on the indictment and statement of facts document unsealed Tuesday in the Manhattan district attorney's case against former President Donald Trump.

According to Lance Fletcher, a former assistant district attorney at the Manhattan DA's Office, the indictment "discusses an intent to defraud, and an intent to commit another crime, but does not specify what that other crime is."

"This is an important issue because the intent to defraud and intent to commit another crime is what bumps this up from a misdemeanor to a felony," Fletcher continued.

The timing of meetings and payments relative to the 2016 election is also important "because it indirectly argues purpose was campaign-related and not for Trump's personal reasons (such as keeping his marriage together)," Fletcher said.

Marc Scholl, who was a prosecutor in the Manhattan District Attorney's Office for nearly 40 years and is now in private practice with the New York-based firm Lewis Baach Kaufmann Middlemiss, called the statement of facts document "an oddity."

"Why it was not part of the indictment as a conspiracy count is odd, but I guess the DA didn't want to have a misdemeanor," Scholl said, adding that statements of facts like this "are not commonplace."

Scholl noted that the district attorney doesn't need to prove anything that's said in the statement of facts -- just what’s in the indictment.

Michael Bachner, a former assistant district attorney in the Rackets Bureau of the Manhattan DA's Office, said the only surprise in the indictment was "it being expanded to include [former Playboy model Karen] McDougal."

"The theory of the prosecution is exactly as we expected and that is that there was a scheme to bury stories through this catch-and-kill process in order to help Donald Trump get elected, and that these payments were in the campaign contributions which were improperly buried," Bachner continued.

As far as next steps, Trump's attorneys are now "obviously going to file some very significant motions to dismiss the indictment," including by citing statute of limitations, and the theory "that there was no effort to interfere with an election," Bachner said.

"This was all payments made for personal purposes. However, given the timing of the payment is right after the Access Hollywood story, I think the judge is going to let this indictment stand," Bachner said.

-ABC News' Soo Rin Kim and Mike Levine