It would be a "GREAT HONOR" to become a "modern-day Nelson Mandela" in the "clink" for speaking the truth about Merchan, Trump said in April.

Merchan will hold a hearing on Tuesday to determine whether Trump allegedly violated the "unconstitutional" gag order, as Trump described it.

The gag order prevents Trump from making public comments about witnesses participating in the trial, counsel other than Manhattan District Attorney Alvin Bragg (D), "members of the court's staff and the District Attorney's staff, or … the family members of any counsel or staff member, if those statements are made with the intent to materially interfere with … counsel's or staff's work" on the case. It also encompasses prospective jurors.

Trump could be fined and put in jail if Merchan rules in favor of the prosecution, according to Reuters:

Merchan could opt to fine Trump $1,000 for each of those violations, as Manhattan District Attorney Alvin Bragg's office has requested.

The law permits the judge to send Trump to jail for up to 30 days, in what would be a dramatic twist to the first criminal trial of a former U.S. president. Trump says the partial gag order, which prevents him from publicly criticizing witnesses, court officials and their relatives, is a violation of free speech.

"The gag order has to come off," Trump told reporters last week. "People are allowed to speak about me, and I have a gag order, just to show you how much more unfair it is."

"They've taken away my constitutional rights to speak," he said.