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.

Former President Trump's attorney Emil Bove began his cross-examination of former National Enquirer publisher David Pecker by seeking to painting Pecker and Trump's "mutually beneficially" relationship as one that had nothing to do with the election but rather had been underway for years under a "standard operating procedure."

"Seventeen years of providing President Trump with a heads-up about potentially negative publicity?" Bove asked Pecker.

"That's correct," Pecker said.

Bove asked Pecker about the first time he ever provided Trump with information -- which Pecker testified was in the 1990s and related to a negative story about Marla Maples, Trump's ex-wife.

"Fair to say that predated the Trump Tower meeting by a long time?" Bove asked of Pecker and Trump's relationship.

"Yes," Pecker said.

"A lot of interactions?" Bove asked.

"Yes," Pecker responded.

Pecker also testified about buying and suppressing stories for other individuals, such as one for former Rep. Rahm Emanuel for $20,000.

Bove also sought to show that kind of relationship between publishers and politicians was normal, saying there was "nothing wrong about" it.

"You are aware many politicians work with the media to try to promote their image?" Bove asked.

"Yes," Pecker responded.

"That's standard operating procedure?" Bove again asked.

"Yes," Pecker said.

"And sometimes when politicians are doing that, that is to try to win elections?" Bove continued.

"Right," Pecker responded.

"Nothing wrong about that?" Bove asked.

"No," Pecker responded.