Donald Trump faced forward and did not appear to make eye contact with any jurors as they entered the courtroom and took their seats in the jury box.

Before any of the lawyers in the case could speak a word, Judge Merchan launched into a lengthy speech outlining how the trial will work.

"We are about to begin the trial of People of the State of New York v. Donald Trump," Merchan told the 12 jurors and six alternates.

Merchan emphasized that the burden of proof rests on the prosecutors and that jurors should presume that Trump is innocent. A guilty verdict requires that each juror determines that the state proved their case beyond a reasonable doubt, Merchan said.

"The defendant is presumed to be innocent," Merchan said. "It is not sufficient to prove that the defendant is probably guilty."

Merchan attempted to set expectations for the jurors, only two of which have ever served on a jury before. For example, Merchan told the jurors not to expect the lawyers to launch into lengthy speeches outside of the opening and closing statements.

"That happens in TV and in movies, but it doesn't happen in real trials," Merchan said.

Judge Juan Merchan ruled that if Trump takes the stand, prosecutors can question him about a number of previous legal issues -- but the judge limited the scope of the cases and the extent to which prosecutors can question him about the facts of those cases.

The ruling is a mixed bag for Trump, who had sought to entirely block questioning on these previous issues if he takes the stand.

Judge Merchan ruled that Trump can be questioned by the DA's office on six determinations from four previous proceedings, including aspects of his New York civil fraud case and the gag order violations there, as well as both verdicts in the E. Jean Carroll cases and the 2018 Trump Foundation case.

Prosecutors had originally asked to question Trump about six different proceedings with 13 total determinations.

Merchan said with his ruling, he has "greatly curtailed" how much prosecutors can discuss the underlying facts of those cases.

"The court cautions the defendant that this Sandoval ruling is a shield, not a sword," Merchan said.

Prosecutors told Judge Merchan that they need 40 minutes for their opening statements.

Defense attorneys told the judge they need 25 minutes.

The judge also announced that court will break at 12:30 p.m. ET today, after a juror had a toothache and got an emergency appointment this afternoon.

Court had already been scheduled to end early today, at 2 p.m. ET, due to the Passover holiday.

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.

Former National Enquirer publisher David Pecker testified that he was twice summoned to Trump Tower in the period following the 2016 election: the first time for a meeting with Michael Cohen, and the second with Donald Trump.

The first meeting began in Cohen's office, where Cohen divulged for the first time to Pecker that he personally covered the $130,000 payment to Stormy Daniels, and that he was concerned that he would not receive a bonus from the Trump Organization, Pecker testified.

"He (Cohen) asked me to talk to the boss on his behalf to try to help him get his bonus," Pecker said, referring to Trump.

When Trump himself came into the room, Pecker asked to walk him back to his office -- and at that time, Pecker told Trump that "Michael Cohen is very concerned about his bonus for this year, and I want you to know that he's very loyal."

Trump replied that Cohen had several apartments and taxi medallions, and added, "Don't worry about it, I'll take care of it," Pecker said.

On Jan. 6, 2017, Pecker arrived at Trump Tower for a meeting with Trump and was escorted to his residence by Jared Kushner, he testified.

Pecker said he was ushered into the room, where Trump was surrounded by administration officials James Comey, Sean Spicer, Reince Priebus, and Mike Pompeo -- they were "updating Mr. Trump on the Ft. Lauderdale shooting" that had occurred at the airport there.

Pecker testified that when Trump introduced him to Trump's inner circle of advisers, Trump said of the National Enquirer publisher, "He knows more than anyone else in this room."

"It was a joke. Unfortunately, they didn't laugh," Pecker testified, which brought some laughs from reporters in the gallery. A few jurors smiled at the moment.

Pecker testified that after Trump's advisers left the room, Trump turned to him.

"He (Trump) asked me how Karen [McDougal] was doing -- how's 'our girl' doing. I said, she's writing her articles, she's quiet, things are going fine."

Trump then said, "I want to thank you for handling the McDougal situation." And then he said, "I want to thank you for the doorman situation," Pecker testified.

Pecker testified that he took this to mean that Trump was thanking him "for not publishing any of the stories and helping the way I did."