The People of the State of New York v. Donald J. Trump, et al, is scheduled to get underway in lower Manhattan at 10 a.m. with opening statements.

If opening statements are completed before the end of the day, the New York attorney general plans to begin her case by calling Trump's former Mazars USA accountant Donald Bender to the stand.

Mazars severed its business relationship with the former president last year after learning of the attorney general's findings during the AG's probe.

Though Trump has denied all wrongdoing alleged by the attorney general, Judge Arthur Engoron has already decided the central allegation against Trump and his co-defendants, ruling in a pretrial hearing last week that the AG had provided "conclusive evidence" that Trump overvalued his assets between $812 million and $2.2 billion.

The judge then canceled the Trump Organization's business certificates in New York, severely restricting Trump's ability to conduct business in the state moving forward -- a move that Trump attorney Alina Habba called "nonsensical" and "outrageously overreaching."

"In defendants' world: rent regulated apartments are worth the same as unregulated apartments; restricted land is worth the same as unrestricted land; restrictions can evaporate into thin air," Engoron wrote, citing multiple arguments made by defense to justify the allegedly inflated valuations of Trump's assets. "That is a fantasy world, not the real world."

Among the issues still to be determined at trial: What additional penalties Trump might face, and what might happen with the multiple causes of action included in the attorney general's suit.

Former President Donald Trump stepped up his attacks on the judge overseeing and deciding his case, writing on Truth Social overnight that Justice Arthur Engoron should resign and be sanctioned for "abuse of power."

Similar to an earlier post, Trump criticized allegations regarding the value of his Mar-a-Lago estate, in addition to an appellate court's ruling that his lawyers unsuccessfully tried to use to limit the timeframe of the case.

Former President Trump posted on his Truth Social platform Sunday night that he intends to attend the opening of the trial.

"See you in court -- Monday morning," he wrote in a post.

Earlier Sunday, multiple sources familiar with the decision told ABC News that Trump was expecting to attend.

Trump will have no speaking role in court on Monday, but it is anticipated that he'll return to the courthouse toward the end of the state's case when court records show he will be called as a witness.

The sworn testimony of former President Trump in court yesterday was "hollow and untrue," according to a written order issued today by Judge Engoron.

The order, which memorializes yesterday's ruling that Trump violated the case's limited gag order, offers a stronger repudiation of Trump's sworn testimony than the judge articulated yesterday, when he called Trump's testimony "not credible."

"I then conducted a brief hearing, during which Donald Trump testified, under oath that he was referring to Michael Cohen. However, as the trier of fact, I find this testimony rings hollow and untrue," Engoron wrote in his order.

Like his in-court statements yesterday, Engoron remarked that Trump's hallway statement about "a person who's very partisan sitting alongside him, perhaps even more partisan than he is" was inconsistent with how Trump frequently refers to Cohen. Going as far as to cite the Oxford English Dictionary, Engoron wrote that "alongside" is more likely to refer to his clerk than the witness, who sits below the judge.

"Using imprecise language as an excuse to create plausible ambiguity about whether defendant violated this Court's unequivocal gag order is not a defense; the subject of Donald Trump's public statement to the press was unmistakably clear," Engoron wrote.

Trump's lawyers said they plan to appeal the order.