Judge Juan Merchan plans to issue a ruling tomorrow about the bounds of Donald Trump's cross-examination if the former president decides to testify during the trial.

After hearing a brief oral argument this afternoon, Merchan told the parties he is reserving his decision, which he plans to issue sometime tomorrow.

Prosecutor Matthew Colangelo argued that Trump's alleged prior bad acts as demonstrated by a variety of civil and criminal determinations should be fair game during cross-examination.

The Sandoval hearing on Trump's potential testimony got underway with prosecutors pushing to cross-examine former president Donald Trump about his alleged violation of the limited gag order in his civil fraud trial.

Prosecutor Matthew Colangelo asked Judge Merchan to permit them to ask the former president about his testimony during his civil fraud trial when the former president claimed he was not referring to Judge Arthur Engoron's law clerk during remarks in the hallway of the courthouse last year.

Engoron determined that Trump's brief testimony rang "hollow and untrue."

Colangelo asked Merchan to allow cross-examination about Trump's testimony and the gag order violation last year in order to probe his credibility.

"He lied," Colangelo said of Trump. "It is very hard to think of something more probative of a testifying defendant's credibility."

Judge Juan Merchan began the court's afternoon session but did not mention the self-immolation incident this afternoon in the park across from the courthouse, and Trump did not respond to questions about the incident when asked by a reporter in the hallway outside the courtroom.

The judge plans to hold a Sandoval hearing this afternoon to determine the bounds of Trump's cross-examination if he decides to testify.

In a filing earlier this week, prosecutors said they planned to question the former president about his past civil cases, including $464 million business fraud judgment, the defamation and battery cases brought by E. Jean Carroll and a lawsuit Trump filed against Hillary Clinton claiming she conspired to rig the 2016 election.

Prosecutors also want to question Trump about the Trump Organization's 2022 criminal trial for tax evasion and the civil case against the Trump Foundation for misusing charitable donations to further Trump's political interests.

Trump is seated at counsel table between his lawyers Emil Bove and Todd Blanche. Manhattan District Attorney Alvin Bragg is not present in the courtroom.

Former President Trump has filed a new emergency appeal to change the venue of his criminal trial.

Oral arguments are scheduled for this afternoon to determine whether the trial should be temporarily paused.

The motion is expected to cite some of the responses prospective jurors gave during the jury selection process.

Trump's prior attempts to move the trial out of Manhattan have failed.

Following the loss of Juror. No. 2, attorneys are now discussing an issue with yet another juror -- Juror No. 4 -- after Assistant District Attorney Joshua Steinglass said the the DA's team did research that "possibly called into question the veracity" of the answers he gave on the jury questionnaire.

Steinglass said a person with the same name as Juror No. 4 -- the Puerto Rican man who said he found Trump "fascinating and mysterious" -- had been arrested in the 1990s in Westchester for "tearing down political advertisements."

“I actually believe the propaganda that was being ripped down was political posters that were on the right -- the political right," Steinglass said.

He suggested that Juror No. 4's answer to question 19 on the questionnaire -- if you have ever been accused or convicted of committing a crime -- then "was not accurate."

Steinglass added they discovered the juror's wife had been embroiled in a "corruption inquiry" that resulted in her "entering in a differed prosecution agreement ... with the Manhattan DA's office."

Steinglass said they felt they were "ethically and legally obligated to bring this information to the court."

Judge Merchan said he instructed Juror No. 4 to be in court at 9:15, but he still has not shown up.

Trump attorney Todd Blanche said he did not consent to dismissing the juror without first hearing from him. They will revisit the issue later.