Judge Merchan has begun hearing arguments about the admissibility of some defense exhibits, including an email communication between Michael Cohen and his one-time attorney Bob Costello's law partner Jeffrey Citron.

Defense attorney Todd Blanche argued that the exhibit could be used to impeach Cohen's testimony.

Judge Merchan said he will not allow the email into evidence. Prosecutors argued that the email was hearsay and cannot fairly offer a window into Cohen's state of mind.

"There is another layer there of hearsay," Merchan said about the email. "I don't see any probative value for impeachment purposes here at all."

"Good morning Mr. Trump," Judge Juan Merchan said as he gaveled in the proceedings.

"It's become apparent that we are not going to be able to sum up tomorrow," the judge said after taking the bench.

Merchan said it's more likely summations will take place next Tuesday, after procedural matters and the Memorial Day break.

"Either have a long break now or a long break then, and unfortunately the calendar is what it is," the judge said.

Prosecutors have entered the courtroom for Day 19 of the trial.

Trump has arrived with his entourage.

Before entering, the former president addressed reporters but ignored their questions about whether he'll testify in the trial.

Donald Trump's former attorney Michael Cohen returns to the witness stand this morning for the final time before prosecutors rest their case against the former president in his criminal hush money trial.

Prosecutors could rest their case later this morning.

Defense attorneys have not yet declared who they plan to call to testify -- including whether Trump will testify in his own defense.

Cohen, the prosecution's last major witness, is expected to complete his cross-examination by Trump's defense team before lunch.

Proceedings are scheduled to get underway at 8:45 a.m. ET with arguments over the admission of additional exhibits, after which the jury is expected back in court at 9:30 a.m.

Defense attorney Todd Blanche, on redirect examination, asked Michael Cohen about the photograph of Trump and bodyguard Keith Schiller together on Oct. 24, 2016, at 7:57 p.m.

"Your testimony is still, just so I understand, is in that 90 seconds you spoke to Mr. Schiller about the problem you were having with the 14-year-old, got him to agree to take care of it," and also had time to talk to speak about Daniels to Trump.

Cohen stood by his testimony.

Cohen also testified again that his $420,000 payment in 2017 was a reimbursement, not a payment for legal services.

"It was a reimbursement -- it wasn't a payment for your services?" Blanche asked.

"Correct," Cohen said.

Blanche attempted to cast doubt on that claim by highlighting Trump's frugality.

"Did he overpay for things regularly?" Blanche asked.

"No, sir," Cohen said.

Cohen then concluded his testimony and the state rested its case.

"Your honor, the People rest," Steinglass said.