The earliest possible day that former Trump attorney Michael Cohen could testify is next Monday, Judge Engoron said.

Cohen, who for years was Trump's so-called "fixer," said an ongoing medical issue had forced him to postpone his testimony, which was originally scheduled to begin tomorrow.

Judge Engoron noted that he has not yet received Cohen's "all-important doctor's note," but that he hopes to receive it sometime today.

Trump attorney Chris Kise criticized the delayed appearance of Cohen, who he described as central to the state's case -- noting that Cohen has continued to post to social media despite his medical issue.

"He does continue to be active in his pursuit of my client," Kise said. "He does not appear to be that infirm."

Trump Organization executive Patrick Birney testified that then-CFO Allen Weisselberg told him that Trump wanted to see his net worth "go up."

"Did Allen Weisselberg ever tell you that Mr. Trump wanted his net worth on the statement of financial condition to go up?" state attorney Eric Haren asked Birney.

"Yes," Birney said. "I think that happened in Allen Weisselberg's office."

Birney said the meeting with Weisselberg happened sometime between 2017 and 2019, but could recall a specific date.

The testimony prompted a quick objection from Trump attorney Chris Kise, who pushed back on claims from the New York attorney general that there was a conspiracy between Trump Organization employees to inflate Trump’s net worth.

"They are mixing hearsay and the conspiracy," Kise argued.

Judge Engoron asked both parties to submit two-page memos by tomorrow about whether the statements from Birney are hearsay.

Trump's lawyers declined to cross-examine Birney, who stepped down from the stand, clearing the way for Trump Hotels chief accounting officer Mark Hawthorn to testify.

On the heels of former Trump attorney Michael Cohen's decision to delay his testimony, Judge Engoron said that "the schedule for the rest of this week is somewhat up in the air."

The judge, however, promised to offer clarity about the trial schedule later today.

Engoron also acknowledged the anticipated return on Tuesday of former President Trump to the courtroom.

When the judge, while waiting for a witness to enter, joked about arguing before an empty chair, defense attorney Chris Kise replied, "It won't be empty tomorrow."

Engoron responded with a smile, saying "So I hear."

The civil fraud trial of former President Trump, his adult sons, and Trump Organization executives enters its third week with a notable schedule change.

Trump's former lawyer and so-called "fixer" Michael Cohen, who was initially scheduled to begin his testimony on Tuesday, has delayed his court appearance due to a preexisting medical condition.

"I look forward to testifying and correcting the record as to the multiple misstatements and responses by previous witnesses who stated … 'I don't recall.' Unfortunately for them, I do," Cohen told ABC News on Saturday.

Trump is expected to attend multiple days of the trial beginning on Tuesday, according to sources familiar with his plans.

In the meantime, Trump Organization executive Patrick Birney is expected to conclude his testimony this morning.

Birney is scheduled to be followed on the stand by Mark Hawthorn, the chief accounting officer at Trump Hotels.

Senior Enforcement Counsel Kevin Wallace of the New York attorney general's office will lead the direct examination of Donald Trump when the former president takes the stand this morning.

Wallace led the depositions of Trump during the New York attorney general's investigation and also delivered the state's opening statement in the trial.

"The defendants were lying year after year," Wallace said in his opening statement.

A constant presence in court during the trial, Wallace joined the New York AG's office in 2018 after working in the private sector for 15 years.

Wallace and Trump sparred for hours during Trump's April deposition, according to a transcript of the deposition that was subsequently released by the AG's office.

"We're going to be here until midnight if your client answers every question with an eight-minute speech," Wallace remarked after one of Trump's lengthier answers.

Wallace tried to press Trump on spreadsheets that Wallace displayed during the deposition, promoting frequent objections from Trump's lawyers.

"Oh my God -- are you people capable of reading a spreadsheet?" an exasperated Wallace said after one objection from Trump's attorney Chris Kise.