"One thing I know a lot about is the legal definition of fraud," Justice Arthur Engeron said as he gaveled court into session prior to the start of opening statements.

Engoron opened the proceedings after allowing cameras in to document the scene in the courtroom: Trump, arms folded, flanked by his legal team; Engeron on the bench; and throngs of reporters and spectators in the gallery.

"I've promised to do my best despite my lame attempts at humor," Engeron said in a brief opening statement. "I take my job very seriously."

The trial is expected to last through Dec. 22, Engeron said, and suggested he would attempt to keep a low profile after today.

"For the next three months, I hope the only words I will mutter are 'Sustained,' 'Overruled,' and 'Let's take a 10-minute break,'" he said.

Opening statements are underway in former President Trump's $250 million fraud trial.

Trump is seated between his attorneys Clifford Robert, Alina Habba and Christopher Kise.

Trump and his co-defendants face a bench trial, meaning that the sole arbiter of the case is Judge Arthur Engoron instead of a jury.

Former President Trump has taken a seat in the courtroom for the start of the trial.

"The crime is against me," he told reporters outside the courtroom before he made his way inside.

He denounced the case in now-familiar terms, criticizing state Attorney General Letitia James as she sat inside the courtroom.

Trump also accused Judge Arthur Engoron of failing to account for the full value of his real estate portfolio, asserting his Mar-a-Lago estate is worth "50 to 100 times more" than the judge's decision for partial summary judgment said last week.

"We have other properties, the same thing. So he devalued everything," Trump said. "We have among the greatest properties in the world. and I have to go through this for political reasons."

Engoron decided Trump's statements of financial condition were fraudulent, but Trump said, "We have a clause in the contract that says, essentially, buyer beware."

Former President Trump, speaking to reporters on his arrival at the lower Manhattan courthouse, said the trial is a witch hunt resulting from his standing in the presidential polls.

"This is a continuation of the greatest political witch hunt of all time," he told reporters outside the courtroom.

Trump said he is innocent of the accusations and that his portfolio has a much higher value than what the attorney general alleges.

State attorney Louis Solomon focused on the activities of The Donald J. Trump Foundation, Trump's defunct charity organization, during his direct examination of tax lawyer Sheri Dillon.

Dillon, who worked with Trump between 2005 and 2020, testified that she received a letter from the New York attorney general in 2016 regarding a potential violation by Trump's charity, which she discussed with then-Trump Organization CFO Allen Weisselberg.

Solomon's line of questioning prompted an objection from Trump's attorney Chris Kise, who argued that Trump's charity was irrelevant to the state's case. But Judge Engoron overruled the objection.

"To me, this case is not just about financial statements being submitted to insurance companies. It is about whether or not defendants were committing fraud," Engoron said. "If the evidence shows a particular defendant was consistently acting fraudulently, the law says there can be particular forms of equitable relief."

Dillon testified that she could not recall if Trump Organization executives notified potential insurers about the violation.

Then-New York Attorney General Barbara Underwood sued the Trump Foundation in 2019 for using money set aside for charitable purposes to settle business disputes and cover political expenses. Trump was eventually ordered to pay $2 million to various charities as part of a settlement.