At least 50 of the 96 potential jurors in the first group have been excused from service after they identified that they can't be fair or impartial regarding the case.

Judge Merchan is now beginning the process of questioning the remaining jurors.

During his lengthy remarks to potential jurors regarding the case, Judge Merchan listed several individuals who could potentially be called as witnesses at trial -- but emphasized that not all would be summoned to the stand.

Among those Merchan listed as potential witnesses were Trump, Stormy Daniels, and former Trump attorney Michael Cohen, as well as David Pecker, the former American Media Inc. executive who prosecutors say played an integral role in a plan to "catch and kill" negative stories about Trump in 2016.

Several Trump family members were also named, including Melania Trump, Eric Trump, Donald Trump Jr., Jared Kushner and Ivanka Trump.

Other potential witnesses listed were former members of Trump's administration, including Steven Bannon, Kellyanne Conway, Reince Priebus, Hope Hicks and John McEntee.

Merchan also listed a number of former employees of the Trump Organization, including Allen Weisselberg, Jeffrey McConney, Dan Scavino, Rhonna Graff and Alan Garten. Additional names mentioned included Robert Costello, Keith Davidson, and Rudy Guliani.

As Judge Merchan reviewed the details of the case for the first group of 96 prospective jurors, former President Trump turned and faced the group -- eliciting visible responses from the gallery.

One woman let out an audible giggle, covered her mouth, and looked to her neighbor with eyebrows raised. Others craned their necks from the rear of the courtroom to catch a glimpse of the defendant.

Trump earlier had his eyes locked on Merchan as the judge went through his instructions to the group.

The former president subsequently appeared to close his eyes and fold his arms, sporadically adjusting in his seat.

The first group of 96 prospective jurors has been sworn in.

Judge Merchan is now delivering remarks that he said will last about 30 minutes, introducing the case and explaining to prospective jurors their responsibility -- if selected -- to be fair and impartial.

Trump has been leaning forward in his seat listening, with his elbows on the desk.

Court this morning may start with a hearing over what prosecutors can ask Trump during cross-examination should he take the stand later in the trial.

The judge would hear arguments from both the people and the defense. The proceedings would then move into jury selection later in the morning.

Prosecutors have indicated they would want to cross-examine Trump on approximately "thirteen different court determinations," including the recent civil finding that he sexually abused columnist E. Jean Carroll, the criminal conviction of the Trump Organization last year, the finding that he committed a decade of business fraud, and the dissolution of his charity, according to sources familiar with the matter.

The hearing -- known as a Sandoval hearing -- is standard practice before jury selection and typically occurs when a defendant signals a willingness to testify.

In a filing last month, Trump's lawyers requested a Sandoval hearing to limit the scope of Trump's potential cross examination, if he opted to testify.

ABC News' Katherine Faulders contributed to this report.