Judge Merchan began by denying the state's request to enter into evidence former Trump Organization CFO Allen Weisselberg's separation agreement with the company.

"It would come in as a business record, but I am not going to allow it in," Merchan said. "It doesn't prove any element of the offense, it doesn't move the ball in any way."

Prosecutors sought to introduce the agreement -- which allotted Weisselberg $2 million after he left the Trump Organization-- to explain why Weisselberg was not testifying at the trial. Weisselberg is currently serving a five-month sentence on Rikers Island for perjury.

Trump, meanwhile, has been waiting patients at the defense table for the jury to enter, which is taking a bit longer than usual.

"Where's the jury?" one individual in his entourage could be heard whispering.

Judge Juan Merchan took his seat on the bench and opened the day's proceedings.

Each of the lawyers made brief introductions before Merchan addressed Trump in his usual fashion.

"Good morning, Mr. Trump," Merchan said from the bench.

Donald Trump has entered the courtroom. He looked around the room as he made his way to the front.

The former president is joined by his attorneys, as well as numerous associates and Secret Service.

Eric Trump and attorney Alina Habba are seated together in the first row, immediately behind Trump. Behind them in the second row, which is completely full, are Trump's legal adviser Boris Epshteyn, Natalie Harp, and J.D. Vance.

Campaign team members Jason Miller and Karoline Levitt are seated in the very back of the courtroom.

Manhattan District Attorney Alvin Bragg has also entered the courtroom.

Prosecutors from the Manhattan district attorney's office have entered the courtroom.

Prosecutor Susan Hoffinger, who is expected to lead Michael Cohen's direct examination, placed a hefty three-inch binder at the lectern before returning to the counsel table.

Jurors saw an April 21, 2018, email where Michael Cohen's attorney at the time, Robert Costello, told Cohen, "Sleep well tonight, you have friends in high places."

"The friend in high places was President Trump," Cohen testified.

"It let me know that I was still important to the team, and stay the course, that the president had my back," Cohen said about Costello's emails.

Jurors then saw another email from Costello dated June 13, 2018.

"Since you jumped off the phone rather abruptly, I did not get a chance to tell you that my friend has communicated to me that he is meeting with his client this evening and he added that if there was anything you wanted to convey, you should tell me and my friend will bring it up for discussion this evening," Costello wrote.

According to Cohen, the aforementioned client was Donald Trump.

Asked about the vagueness of the email, Cohen testified that it was "sort of to be covert -- it is all back channel. Sort of eye spy-ish. Didn't want to put anybody's name."

Jurors then saw a June 2018 email between Cohen and Costello that suggested their relationship had begun to fray.

"I must tell you quite frankly that I am not used to listening to abuse like today's conversation," Costello wrote, referencing an "unfortunate outburst" by Cohen.

"Please remember if you want or need to communicate something, please let me know and I will see that it gets done. I hope I am not wrong but it seems to both Jeff and I that perhaps we have been played here," Costello wrote, referencing the back channel to Trump.

Cohen told the jury he was concerned about his communications with Costello making their way to Trump, and he began looking for other lawyers.

Cohen said Costello was "again pressuring me as he had done with constant calls and sending me emails and so on. He wanted to absolutely be retained to represent me in this matter. He was angered that I was willing to sit down with another attorney but not sit down with them, so I had enough."