Judge Juan Merchan announced there is an issue with Juror No. 9 -- who, according to Merchan, "was concerned about media attention" of the case. According to Merchan, the juror "wasn't 100% sure" they could serve.

Merchan said they would speak to the juror in chambers to "find out what the issue is and see if this juror can continue to serve."

After a brief sidebar, the judge announced: “Juror No. 9 is going to remain with us.”

There are six alternate jurors seated in case any of the 12 jurors cannot serve.

On his way into the courtroom for the day's proceedings, Trump once again alleged that the trial constitutes election interference, claiming that the proceedings are unfairly keeping him off the campaign trail.

"Everybody knows that I'm here instead of being able to be in Pennsylvania and Georgia and lots of other places campaigning, and it's very unfair," he told reporters.

"It's a very, very sad day in America," he said. "I can tell you that."

The former president is seated at the defense table between his lawyers Todd Blanche and Emil Bove.

-Mike Pappano

The proceedings are underway in former President Donald Trump's hush money trial. Trump and Manhattan District Attorney Alvin Bragg are both in the courtroom.

Three prosecutors -- Joshua Steinglass, Matthew Colangelo, and Susan Hoffinger -- are seated at the counsel table.

Bragg is seated in the front row of the gallery with approximately a dozen lawyers and staff from his office.

The first witness prosecutors with the Manhattan DA's office plan to call is former National Enquirer publisher David Pecker, according to two sources familiar with the matter.

ABC News previously reported that prosecutors planned to call Pecker as a witness, but sources now say he's expected to be the first witness to take the stand.

Pecker served as the longtime chief executive of American Media Inc., which published the National Enquirer.

Shortly after Trump announced his 2016 presidential campaign, Pecker met with Trump and agreed to act as the "eyes and ears" of the campaign by looking out for and killing negative stories about Trump, according to the Manhattan DA.

As part of the arrangement, Pecker allegedly directed a deal to pay $30,000 to a former Trump Tower doorman regarding the false allegation that Trump allegedly fathered a child out of wedlock, prosecutors say. Then-Trump attorney Michael Cohen allegedly insisted that the deal stay in place even after AMI discovered the allegation was false, and AMI paid the doorman, according to the Manhattan DA.

-Katherine Faulders

After a prospective alternate said he has a minority stake in a company that produces Michael Cohen's "Mea Culpa" podcast, Trump leaned forward and turned toward the man at the mention of his former attorney's name.

The man also said he had volunteered for a Democratic get-out-the-vote effort during Hillary Clinton's 2016 campaign.

Several of the prospective alternates said they had read Trump's "Art of the Deal," including a management consultant who likes to be outdoors when he's not working.

A retired teacher made the requisite pledges, saying, "I will solely make my decision solely based on the evidence in the courtroom. There is no reason why I can't be a fair and impartial juror."

"I believe that everyone should obey the law," he said.

A woman with an MBA in information systems who likes to "cook, bake, watch hockey" inquired about the court's schedule for Passover. Told the court was planning to break early this coming Monday and Tuesday, she said that would give her plenty of time to travel to her seders in New Jersey.

A contract specialist for a fintech company said she likes to take her two boys to Knicks games and Rubik's Cube speed competitions.

Another prospective alternate skipped the questionnaire and told the judge she could not be impartial.

"After thinking about this yesterday after hearing the questions, I don't think I can be impartial," the woman said before Judge Merchan excused her without objection.