Trump lawyer Chris Kise continued to spar with state attorney Louis Solomon during the testimony of Mazars General Counsel Bill Kelly.

After Solomon objected to a question posted in Kelly's cross-examination, Kise interjected to call out Solomon for being hypocritical about the bounds of acceptable testimony.

"Everything in this courtroom concerns me and my client, including your health," Kise said, referring back to his earlier concern about a courtroom COVID-19 outbreak.

"Thanks for your concern," Solomon responded offhandedly.

Trump and his attorneys have adjusted their seating compared to past days, possibly due to health concerns, so that Trump and Kise are sitting further from the state attorneys.

Before today's first witness entered court, Trump attorney Chris Kise asked Judge Engoron to postpone today's proceedings after five members of the New York attorney general's team tested positive for COVID-19.

Describing the attorney general's conduct as "beyond irresponsible," Kise said that his team did not get adequate notice about the COVID exposures despite having close contact with positive individuals.

"Nothing else matters except for pursuing President Trump," Kise said. "We have the leading candidate for president of the United States in the courtroom today."

"The attorney general's office knew on Wednesday and didn't tell any of us," defense attorney Clifford Robert said. "We are truly in an outbreak."

Engoron declined to grant their requested delay.

In a statement, a spokesperson for New York Attorney General Letitia James said the state has complied with all CDC guidelines.

"Our office properly notified the court and defendants' counsel, and the court decided to proceed with trial today. If there were any concerns, defendants could wear masks today or at any point, but they have opted not to," the spokesperson said.

Trump called his former lawyer Michael Cohen a "proven liar" and "felon" as Trump entered the courtroom for his civil trial this morning.

"He's a felon, served a lot of time for lying, and we're just going to go in and see and I think you'll see that for yourself," Trump told reporters outside court.

Cohen pleaded guilty in 2018 to two separate criminal cases and eventually spent more than 13 months in prison -- but said that it was Trump who caused him to "follow a path of darkness."

-ABC News' Ricardo Montero contributed to this report.

Exiting his New York City apartment this morning, Michael Cohen told reporters he was "looking forward" to seeing Trump in court.

"It's been five years since we've been in the same room," Cohen said.

Cohen preemptively defended the credibility of his testimony and reiterated that he previously perjured himself "concert with and for the benefit of Donald J. Trump."

"My credibility should not be in question," Cohen said.

-ABC News' Eric Avram contributed to this report.

House Intelligence Committee Chair Rep. Michael Turner and House GOP Conference Chair Rep. Elise Stefanik have requested that the Department of Justice investigate Michael Cohen for perjury following his testimony in the trial last month.

During his trial testimony, Cohen said that he lied to the House Permanent Select Committee on Intelligence in 2019 when he said that Donald Trump and Allen Weisselberg did not ask him to inflate Trump's personal statement.

"So, you lied under oath in February of 2019? Is that your testimony?" defense attorney Alina Habba asked in court.

"Yes," Cohen responded.

Shown his 2019 testimony in court, Cohen subsequently reversed himself and said that his 2019 testimony was truthful, explaining the contradiction by clarifying that Trump speaks like a "mob boss" and that he indirectly asked for his statement to be inflated.

In a letter to Attorney General Merrick Garland sent today, Stefanik and Turner requested that the Department of Justice open an investigation into Cohen potentially committing perjury.

"That Mr. Cohen was willing to openly and brazenly state at trial that he lied to Congress on this specific issue is startling," they wrote. "His willingness to make such a statement alone should necessitate an investigation."

Last week, Stefanik sent a separate judicial complaint to the New York State Commission on Judicial Conduct related to the conduct of the judge overseeing Trump's trial. In a statement to ABC News, a court representative said in response that the judge's actions "speak for themselves."