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.

Court was adjourned for the day following an afternoon in which Judge Engoron appeared to shoot down one of the defense's main remaining arguments following defense attorneys' request for a directed verdict.

Defense lawyer Chris Kise argued that the state failed to prove that Trump's lenders would have acted differently had they known about the fraud alleged by the New York attorney general -- but Engoron said "the mere fact that the lenders were happy doesn't mean the statute wasn't violated."

Earlier this month, during testimony from the defense's first expert witness Steven Witkoff, Trump's lawyers attempted to argue that Trump had undervalued some of his properties, which balanced out the alleged inflated properties in his statement of financial condition. Engoron, however, declined to allow testimony related to that argument, saying, "The reader of the financial statement has the right to know whether each particular number was accurate."

That same day, Trump's lawyers also presented testimony from expert witness Jason Flemmons that Trump disclosed that the values of nearly 95% of the assets in his financial statements departed from generally accepted accounting practices.

"It's effectively saying, 'User beware,'" Flemmons said.

But Engoron said Flemmons only addressed the methods used in the statements, rather than the numbers themselves, which could have been incorrect.

Defense attorneys are scheduled to call additional witnesses over the next week before Eric Trump and Donald Trump return to the stand as the defense wraps up its case in the next two weeks.