Day 6 of Donald Trump's criminal trial will begin with a hearing in front of Judge Juan Merchan in which prosecutors will seek to have the former president held in contempt for repeatedly violating the limited gag order in the case.

Prosecutors have argued that Trump violated the limited gag order -- which prohibits statements about witnesses, jurors, and lawyers in the case other than Manhattan District Attorney Alvin Bragg -- on at least ten separate occasions this month, and have asked the judge to hold him in contempt of court and fine him $10,000.

Trump's lawyers have argued that prosecutors have not proven the posts in question were willful violations of the gag order, telling Merchan that the former president was defending himself from attacks by the likely witnesses.

Following the hearing, testimony in the hush money trial is scheduled to resume with former National Enquirer publisher David Pecker on the stand. Prosecutors believe he is key to understanding Trump’s motivation for paying off Stormy Daniels so damaging information did not seep into the 2016 campaign.

Moments after his criminal trial adjourned for the day, Donald Trump exited the courtroom and told reporters that his payments to his former attorney Michael Cohen were appropriately labeled as legal expenses.

"Actually, nobody's been able to say what you're supposed to call it," Trump told the media. "If the lawyer puts in a bill or an invoice and you pay the bill ... that's a very small little line ... it's not like you could tell a life story."

"They marked it down for a legal expense. This is what I got indicted over," Trump said.

The former president also attempted to paint Cohen as an unreliable witness and said he "wasn't very good in a lot of ways" as an attorney.

Trump's motorcade then departed the courthouse.

-Mike Pappano

David Pecker stepped off the witness stand after his initial testimony. He is scheduled to return to the witness stand tomorrow at 11 a.m. ET.

During his brief testimony, Pecker suggested that former National Enquirer Chief Content Officer Dylan Howard -- an alleged participant in the catch-and-kill scheme alleged by prosecutors -- will be unable to testify due to a medical condition.

Pecker appeared to greet Trump and his lawyers as he exited the courtroom.

Court subsequently wrapped for the day.

Trump left the courtroom flanked by Secret Service agents and staffers, as well as Trump Organization General Counsel Alan Garten.

Judge Merchan is scheduled to hold a contempt hearing about Trump’s alleged violations of the case’s limited gag order tomorrow morning at 9:30 a.m. ET.

David Pecker, who once called Donald Trump "a personal friend of mine," flashed a big smile as he took the stand as the trial's first witness, belying the gravity of the moment.

Pecker cackled loudly into the microphone, jolting the room, when prosecutor Josh Steinglass, asked him about his various phone numbers that he struggled to remember.

Pecker, 72, was the publisher of the National Enquirer but prosecutors said he was "acting as a co-conspirator" in helping buy and bury damaging stories about Trump, including a doorman's false claim that Trump had fathered a love child and a Playboy model's claim of a sexual relationship with Trump, who has denied both allegations.

Trump, who once said Pecker would make a "brilliant" choice as editor of Time magazine, listened while leaning forward in his chair, arms crossed on the table, an unhappy look on his face.

Pecker testified that he had final say whether to publish any story involving a famous person.

"I had the final say of the celebrity side of the magazine," Pecker said. "We used checkbook journalism. We paid for stories."

Pecker is testifying pursuant to a subpoena. He has also secured a non-prosecution agreement with the Manhattan district attorney's office.

A prospective juror who went through questioning but was ultimately excused from the case told ABC News outside the courthouse that she didn't like the former president, but that it was important he get a fair trial.

"I don't like him, I don't approve of what he did as president," said Kara McGee, when asked by ABC News about her feelings on Trump. "But the right to a fair trial is extremely important. And if this would serve to uphold that, then that would be my priority."

McGee was excused from the case because of scheduling conflicts with her job.

"No matter what you think about someone as a person, or what other things they may have done, what he is on trial for is a very specific thing that even he deserves the right to a fair trial," she said.

Asked about the sentiment of the other prospective jurors on their opinions of Trump, McGee said it "seemed pretty even, surprisingly."

"I thought because this is Manhattan it might be a little bit more liberal, but there were a number of people who said 'Yes, I listen to Fox, I watch Fox, I have been on Trump mailing lists in the past,'" she said. "So not really leaning towards one side or the other, that I can tell."

"You got a sense that people were really trying to put anything that they had brought to this aside, and step in and do their civic duty," she said. "And that people really were being honest."