Members of Donald Trump's legal team, speaking to reporters outside the courthouse prior to the start of the trial, called the fraud allegations against the former president "election interference."

Trump's attorneys said that Democrats were using the case to fight Trump's efforts to retake the White House in 2024.

New York Attorney General Letitia James has arrived at the courthouse in lower Manhattan.

"No matter how powerful you are, no matter how much money you think you may have, no one is above the law," James said to the cameras before entering the courthouse.

"Today we will prove our case in court," she said. "Justice will prevail."

Demonstrators across the street from the courthouse cheered and applauded as the AG arrived.

Former President Trump is in a motorcade on his way to the courthouse in lower Manhattan where his fraud trial will get underway this morning.

Opening statements in the case are scheduled to get underway at 10 a.m. ET.

-John Santucci

New York Attorney General Letitia James released a statement on Monday just hours before the first day of trial in her fraud case against former President Donald Trump.

"For years, Donald Trump falsely inflated his net worth to enrich himself and cheat the system," James said. "We won the foundation of our case last week and proved that his purported net worth has long been rooted in incredible fraud. In this country, there are consequences for this type of persistent fraud, and we look forward to demonstrating the full extent of his fraud and illegality during trial."

"No matter how rich or powerful you are, there are not two sets of laws for people in this country," she added. "The rule of law must apply equally to everyone, and it is my responsibility to make sure that it does."

Patrick Birney had been working for the Trump Organization for more than two years when a magazine article prompted him to change Trump's financial statement, the executive testified.

"There was an article written that stated that Mr. Trump's triplex was actually 10,900 or so square feet," Birney said, referring to a 2017 Forbes magazine article that alleged Trump had been lying about the size of his residence. (Judge Engoron decided in his partial summary judgment last month that the size was misrepresented.)

Birney, who was an assistant VP at the time, testified that Trump Organization executives, including former CFO Allen Weisselberg, "verified" the size and adjusted the next year's statement of financial condition. As a result, the penthouse was valued at $116 million in 2017 -- a steep drop from the 2016 valuation of $327 million.

Birney testified that he looked up comparable properties to come up with the value of the apartment going forward.

"I Google searched recent penthouse sales in Manhattan," Birney said, eventually landing on an web article about a penthouse purchased by billionaire Ken Griffin that set the record for most expensive home ever sold in the United States.

A price-per-square-foot for Trump's penthouse was determined based on that record-breaking sale, Birney said.

When Birney was tasked with finding comparable properties to value Trump's Mar-a-Lago Club, he similarly searched for nearby Palm Beach homes. However, Trump signed a deed in 2002 that limited Mar-a-Lago's purpose to a social club, the New York attorney general alleges, making the price of nearby residences irrelevant.

Asked if he was ever told about the deed by anyone at the Trump Organization, Birney replied, "I don't believe I was." Instead, he said he first learned about it during an "interview with the attorney general's office."

Court then adjourned for the day, with Birney's testimony scheduled to resume tomorrow morning.