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.

Judge Merchan again explained the legal theory at the center of the case.

Prosecutors allege that Trump falsified business records in order to hide a violation of New York election law.

"Under our law, a person is guilty of such a conspiracy when, with intent that conduct be performed that would promote or prevent the election of a person to public office by unlawful means, he or she agrees with one or more persons to engage in or cause the performance of such conduct," Merchan said.

Prosecutors offered three theories about the unlawful means: a tax crime, falsification of bank records, or campaign finance violations. The jury does not need to be unanimous about which theory they believe.

"Although you must conclude unanimously that the defendant conspired to promote or prevent the election of any person to a public office by unlawful means, you need not be unanimous as to what those unlawful means were," Merchan said.

In a social media post last night, Trump falsely claimed Judge Merchan was "not requiring a unanimous decision" in the case. Merchan reiterated that the jury does indeed need to be in full agreement about their verdict that Trump falsified business records in furtherance of another crime -- but they don't have to agree on which of the three proposed unlawful means were used to corrupt the election.

Trump, at the defense table, dozed off for a few minutes as Merchan continued his reread. Trump's head was resting on his chest. He then jolted up, shaking his head.