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 National Enquirer publisher David Pecker testified that he was twice summoned to Trump Tower in the period following the 2016 election: the first time for a meeting with Michael Cohen, and the second with Donald Trump.

The first meeting began in Cohen's office, where Cohen divulged for the first time to Pecker that he personally covered the $130,000 payment to Stormy Daniels, and that he was concerned that he would not receive a bonus from the Trump Organization, Pecker testified.

"He (Cohen) asked me to talk to the boss on his behalf to try to help him get his bonus," Pecker said, referring to Trump.

When Trump himself came into the room, Pecker asked to walk him back to his office -- and at that time, Pecker told Trump that "Michael Cohen is very concerned about his bonus for this year, and I want you to know that he's very loyal."

Trump replied that Cohen had several apartments and taxi medallions, and added, "Don't worry about it, I'll take care of it," Pecker said.

On Jan. 6, 2017, Pecker arrived at Trump Tower for a meeting with Trump and was escorted to his residence by Jared Kushner, he testified.

Pecker said he was ushered into the room, where Trump was surrounded by administration officials James Comey, Sean Spicer, Reince Priebus, and Mike Pompeo -- they were "updating Mr. Trump on the Ft. Lauderdale shooting" that had occurred at the airport there.

Pecker testified that when Trump introduced him to Trump's inner circle of advisers, Trump said of the National Enquirer publisher, "He knows more than anyone else in this room."

"It was a joke. Unfortunately, they didn't laugh," Pecker testified, which brought some laughs from reporters in the gallery. A few jurors smiled at the moment.

Pecker testified that after Trump's advisers left the room, Trump turned to him.

"He (Trump) asked me how Karen [McDougal] was doing -- how's 'our girl' doing. I said, she's writing her articles, she's quiet, things are going fine."

Trump then said, "I want to thank you for handling the McDougal situation." And then he said, "I want to thank you for the doorman situation," Pecker testified.

Pecker testified that he took this to mean that Trump was thanking him "for not publishing any of the stories and helping the way I did."