Jurors will deliberate until 4:30 p.m. ET today if they don't reach a verdict sooner, Judge Merchan said.

"You cannot leave the building and you need to be able to get here quickly" when a verdict is reached, the judge told the parties after the jury had left the courtroom.

Former President Trump got up from the defense table and spoke with several associates, then exited the courtroom with his entourage.

The staff and lawyers from the Manhattan district attorney's office also left the courtroom.

As the 12 main jurors left the courtroom, most appeared to look away from Trump as they passed his counsel table.

The six alternate jurors remained in the courtroom after the 12 main jurors left to begin deliberations.

"We are not going to excuse you just yet," Judge Merchan told the alternates,

He asked them to stick around through the deliberations. though they won't participate in the deliberations themselves.

"That concludes my instructions on the law. Counsel please approach," Judge Merchan said when he was done instructing the jury.

He held a sidebar with the attorneys, after which the jurors filed out of the courtroom to begin deliberations.

Judge Merchan emphasized that jurors each need to come to an individual decision about the verdict after hearing and understanding the view of the other jurors.

"Each of you must decide the case for yourself, but only after a fair and impartial consideration of the evidence with the other jurors," Merchan said.

"You should discuss the evidence and consult with each other, listen to each other, give the others' views careful consideration," he said. "You should not surrender an honest view of the evidence simply because you want the trial to end, or because you're outvoted."

"Your verdict on each count you consider must ... be unanimous -- that is, each and every juror must agree to it," Merchan said.

Merchan said that the jury foreperson will read the verdict for each of the charged counts. Merchan will then poll the entire jury to confirm their verdict.

As jurors begin their second day of deliberations, Trump's legal team feels that the longer the jury deliberates, the more they're hoping for a hung jury, sources told ABC News.

Trump's lawyers see the requests the jury has made to rehear testimony from the case as a mixed bag, the sources said -- not positive news that jurors wanted to rehear former National Enquirer publisher David Pecker's testimony, but at the same time feeling optimistic that jurors requested portions of Michael Cohen's transcript.

Trump's attorneys are looking for any indication that the jury will probe issues surrounding Cohen's credibility, which cuts to the core of their defense, according to the sources.

"We want chaos ... we want evidence of strong disagreements," one person close to Trump's legal team said regarding the jury, signaling their hope that at least one juror will raise doubts about the theories presented by the prosecution.

-Katherine Faulders and John Santucci