Former President Trump has reclaimed his seat at the defendant's table, Judge Juan Merchan is back on the bench -- and the second day of the criminal trial of the former president is underway.

Trump greeted court officers upon arrival, mouthing to one, "How are you?" as he made his way down the aisle accompanied by lawyers Todd Blanche, Susan Necheles and Emil Bove.

Trump is once again seated between Blanche and Bove.

The three men appeared to be in and out of conversation as they awaited the judge, with Trump periodically looking down at the desk or at the monitor in front of him.

Former President Trump, addressing reporters on his way into court, defended the way payments were made to his former attorney Michael Cohen, pushing back on the crux of the DA's case that they were improperly labeled as legal expenses.

"I was paying a lawyer and I marked it down as a legal expense, some accountant," Trump said. "I didn't know. That's exactly what it was."

Manhattan District Attorney Alvin Bragg has accused Trump of improperly labeling the money as legal expenses to Cohen in order to hide that the funds were to repay hush money paid to Stormy Daniels to boost Trump's electoral prospects.

"Legal expense -- that's what you're supposed to call it," Trump said.

"This is a trial that should never happen, it should have been thrown out," he said.

Former President Trump has arrived at the courthouse for the second day of jury selection.

Unlike Monday when a small group of supporters and protesters greeted the former president, there were essentially none at the courthouse this morning.

He again railed on social media against the limited gag order that prevents him from targeting witnesses and others associated with the case.

"I want to speak, or at least be able to respond," Trump wrote on his social media platform, attacking Judge Juan Merchan and again claiming the trial is "election interference."

ABC News' Soo Rin Kim and Lalee Ibssa contributed to this report.

Jury selection will continue today on Day 2 of former President Trump's hush money trial.

Attorneys on Monday began the process of narrowing down the first group of 96 juror prospects, but none were seated by the end of the day.

Attorneys today will continue their questioning of the remaining juror prospects from that group, with a new group of prospective jurors scheduled to arrive in court this morning.

Former President Trump, sitting at the defense table, softly shook his head "no" when prosecutor Matthew Colangelo told the jurors that Trump formed a "conspiracy" with Michael Cohen and David Pecker to "help him get elected."

It was one of the most notable reactions from Trump as he sits and listens to prosecutors lay out their story of the case.

Colangelo then brought up the "Access Hollywood" tape and said it showed Trump "bragging about sexual assault," Trump shook his head no again, pursing his lips. He did not react when Colangelo, quoting Trump on the tape, said, "grab them by the p----."

Earlier, as Colangelo brought up a former Trump doorman who was he said was paid off as part of the alleged catch-and-kill scheme, Trump -- looking annoyed -- leaned over and tapped his lawyer Todd Blanche. When Colangelo said the doorman was paid $30,000 to bury his story, Trump raised his eyebrows and grabbed onto a pen.

The former president has been passing notes and sliding papers between Blanche and attorney Emil Bove, and leaning side-to-side, whispering to them. Blanche at one point pulled out his own sticky note and slid a note back to Trump.

At other times he has hardly seemed engaged at all, slumping in his red leather chair looking straight forward with no facial expression, or fidgeting with his head tilting back and forth. At one point during jury instructions he let out a yawn.