"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.

Donald Trump has lost his appeal to throw out the limited gag orders and associated fines in his civil fraud trial.

In a decision Thursday, New York's Appellate Division, First Department rejected Trump's request to annul and vacate the limited gag orders imposed by Judge Arthur Engoron that prohibit Trump and attorneys from commenting on the judge's staff.

In November, Trump's lawyers asked the Appellate Division to vacate the gag orders, citing a provision of New York state law to personally sue Judge Engoron. But the court said in today's ruling that the method used to appeal the gag orders was an improper application of the law.

"To the extent there may have been appealable issues with respect to any of the procedures the court implemented in imposing the financial sanctions, the proper method of review would be to move to vacate the Contempt Orders, and then to take an appeal from the denial of those motions," the ruling said, indicating that Trump should use the normal appellate process to pursue the vacating of the gag orders.

The court also determined that the "extraordinary remedy" requested by Trump's lawyers did not match the minimal potential harm from barring statements about Engoron's staff.

"Here, the gravity of potential harm is small, given that the Gag Order is narrow, limited to prohibiting solely statements regarding the court's staff," the decision said.