Judge Merchan told jurors that Michael Cohen is an "accomplice" to the alleged crime, so the jury cannot convict Trump on Cohen's testimony alone.

Even if they believe Michael Cohen, they need to rely on evidence corroborating his testimony, Merchan said.

Trump, at the defense table, appeared to perk up just a bit at this, looking up at Merchan as he delivered this information to the jury.

Judge Merchan told the jury that they have the ultimate authority in determining the truthfulness of a witness' testimony -- an instruction that might come in handy given the emphasis that defense lawyers placed on Michael Cohen's testimony, which they say includes lies.

"You will alone determine the truthfully and the accuracy of the testimony of each witness," Merchan said.

He added that the jury could either disregard the testimony of an untruthful witness entirely, or disregard part of it.

"There is no particular formula" to determine credibility, Merchan said.

"You may consider whether the witness has any interest in the outcome of the case," he said -- another matter that might weigh on jurors' minds.

"You may consider whether a witness did have, or did not have, a motive to lie," the judge said.

Trump's attorney had told the jury Cohen had an "axe to grind" against his former boss. Prosecutors partially conceded that Cohen had a motive, acknowledging that, to date, he is the only one who suffered any consequences from the matter at hand.

Trump, at the defense table, appeared to look over to the jury and offer a bit of a closed-mouth grin.

Judge Merchan instructed the jury that they cannot hold Trump's not testifying against him.

"Defendant is not required to prove that he is not guilty," he said.

"The defendant is not required to prove or disprove anything," said the judge.

Judge Merchan told the jury that they should not speculate about the sentence or punishment in the case.

"It will be my responsibility to impose an appropriate sentence," Merchan said.

The judge also had to advise the jury about this yesterday after defense lawyer Todd Blanche argued that the jury "cannot send somebody to prison" based on Michael Cohen's testimony.

The jury appears to be laser focused on Merchan during the charge. Half of the jurors appear to be taking notes.

Prosecutor Josh Steinglass continued to lean on the testimony of former National Enquirer publisher David Pecker, arguing it offered unequivocal evidence that Trump was in on the catch-and-kill plan involving Playboy model Karen McDougal.

Pecker testified that Trump was furious at Pecker after the Wall Street Journal published a story in November 2016 about AMI's payment to McDougal.

"This is the story that he is simultaneously telling the press he knows nothing about," Steinglass said. "Pecker established unequivocally that Trump was in on the McDougal deal."

Trump was "angry because story came out that threatened his standing with female voters," Steinglass said.

"Of course we will never know if this effort to hoodwink the American voter made the difference in the 2016 election, but that's not something we have to prove," Steinglass said. What matters, Steinglass said, is that the scheme was "cloaked in false business records to hide the conspiracy."

Judge Merchan said the jury would take its next break, then the closing would continue.

"I was watching the jurors," said the judge. "They looked pretty alert to me -- I don't think we're losing anyone."