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.

Former National Enquirer publisher David Pecker testified on cross-examination that the publication's limited involvement in Stormy Daniels' hush money payment was unrelated to the August 2015 Trump Tower meeting where Pecker vowed to serve as the "eyes and ears" of Trump's presidential campaign.

Pecker's testimony on cross-examination about the Daniels story appeared consistent with his testimony yesterday about his strong desire not to be involved in the Stormy Daniels payment.

Pecker said yesterday that he did not want to be involved in the story due to concerns about reputational harm to the National Enquirer and a lack of reimbursement for the other payments he had made to suppress previous Trump stories.

"I said, we already paid $30,000 to the doorman, we paid $150,000 to Karen McDougal, and I am not a bank. I am not paying out any further disbursements among us," Pecker testified yesterday. Pecker said he instructed National Enquirer Chief Content Officer Dylan Howard to flag the Stormy Daniels story to Michael Cohen, who made the payment to Daniels himself.

Asked about Daniels' payment on cross-examination, Pecker said that the National Enquirer's limited involvement was unrelated to their vow to Trump.

"You did not consider the Stormy Daniels story to be part of any agreement you had in August 2015?" defense attorney Emil Bove asked.

"That is correct," Pecker said.

"You wanted nothing to do with it?" Bove said.

"That's correct," Pecker said.

Pecker added that he did not "authorize" Howard to continue communicating with Stormy Daniels' lawyer Keith Davidson about the payment.

When Howard raised concerns to Pecker that Davidson had not yet been paid by Michael Cohen, Pecker said he was angry that Howard continued to communicate with Davidson about the story. In addition to the nature of the story -- which Pecker said could endanger the National Enquirer's relationship with its distributors -- Pecker said Cohen's delay in paying Daniels' lawyer could result in reputational harm to the National Enquirer.

"Frankly, you were not happy to be hearing that?" Bove asked about Cohen's delayed payment.

"Yes," Pecker said.

"The main concern was Howard's reputation?" Bove asked.

"Yes," Pecker said.