Former President Trump has arrived at the courthouse in lower Manhattan.

He stepped out of his motorcade, waved, and walked into the side entrance.

A small group of supporters and protesters both cheered and booed his arrival.

Former President Trump is en route to the courthouse in lower Manhattan for this morning's proceedings.

The former president left for the the courthouse from Trump Tower in Midtown Manhattan.

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.

Former President Trump will leave his Trump Tower apartment in Midtown Manhattan this morning and travel down to lower Manhattan for the first day of jury selection in his criminal hush money trial.

The proceedings come after Trump unsuccessfully tried three times last week to delay the start of the trial through the filing of appeals.

As a defendant in a criminal case, the former president will be required to be in court for the entire trial, which is expected to take six to eight weeks.

According to former National Enquirer publisher David Pecker, Michael Cohen pushed for the National Enquirer to keep doorman Dino Sajudin locked into a contract until after the 2016 election, even though the story Sajudin was shopping about Trump having a love child were untrue.

"I told Michael Cohen the story was not true. I told him that the doorman is very difficult to deal with," Pecker testified.

Cohen had earlier encouraged Pecker to add a $1 million penalty to Sajudin's contract if he broke the agreement and tried to shop around the story.

"He would breach this agreement and owe American Media a million dollars," Pecker said. "It was basically a lever over him to make sure that wouldn't happen."

Cohen encouraged Pecker to keep Sajudin locked in, according to the former publisher.

"I am going release him one way or the other," Pecker said he told Cohen regarding Sajudin. "He said, 'No, release him after the election.'"

"When was he released?" prosecutor Joshua Steinglass asked Pecker.

"December 9, 2016," Pecker said.

"After the presidential election?" Steinglass asked.

"Yes," Pecker responded.