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.

New York Attorney General Letitia James, in a written brief filed a week before the trial's closing arguments, asked the judge in the case to fine Trump over $370 million to disgorge profits from what James says is a decade of fraudulent business conduct, and to bar Trump for life from participating in the New York real estate industry.

The request for a $370 million fine, plus 9% annual interest, is a sharp increase from James' initial request for disgorgement totaling roughly $250 million.

The largest portion of the requested fine stems from the business loans the Trump Organization obtained using allegedly fraudulent financial statements. Based on expert testimony, James argued that Trump cost his lenders $168,040,168, which the banks would have made if Trump was given the appropriate interest rate corresponding to the actual value of his assets.

In their defense filing, Trump's lawyers called the attorney general's theory for disgorgement "fundamentally flawed, saying that "No lenders testified that they would have done anything differently had they known about Trump's misstatements, and James attempted to fill that evidentiary void with expert testimony, according to Trump's lawyers.

Trump's lawyers added that even if the attorney general proved that some of Trump's profits were ill-gotten, they lack the authority under New York Executive Law 63(12) to request the disgorgement.

Closing arguments in the trial are scheduled for Jan. 11.