Donald Trump Jr. took in some ultimate fighting ahead of his scheduled return to the witness stand this morning.

Trump Jr. attended a UFC doubleheader at Madison Square Garden on Saturday night with his father, in addition to Tucker Carlson, Kid Rock, and UFC president Dana White.

"I legitimately can't think of a better squad to roll with," Trump Jr. posted on social media.

Earlier that day while speaking at a campaign rally in New Hampshire, Donald Trump appeared to joke about appointing White to a position in a potential future administration.

"He's a guy I'd like to make my Defense Chief. I wouldn't call him my defense chief. I'd call him my 'Offense Chief.' He'd be my Offense Chief," Trump said.

As Trump's legal team prepares to begin presenting its case this morning, defense attorney Alina Habba says responsibility for the financial statements that the New York attorney general says are fraudulent lies with Trump's external accounting firm.

Previewing the defense's case during an appearance on Fox's Sunday Morning Futures with Maria Bartiromo, Habba also said the banks that loaned money to the Trump Organization were responsible for conducting their own due diligence regarding Trump's financial statements.

The state rested its case last week in the sixth week of the trial. The defense has said they expect their case to wrap up by Dec. 15.

Habba also suggested that Donald Trump plans to file a motion seeking a mistrial.

While Habba declined to comment on alleged misconduct by Judge Arthur Engoron's clerk -- which she is prohibited from doing due to the limited gag order handed down by the judge -- she said the issue would be addressed in their mistrial motion "very soon."

"I actually can't tell you why, because I am gagged. I can tell you that we will be filing papers to address all of those issues," Habba said.

However, Habba downplayed the chance the motion would be favorably decided Engoron.

"The problem we have is the judge is the one who is going to make those decisions, and he has proven himself to be quite motivated by the other side," Habba said.

In response to Rep. Elise Stefanik's letter of complaint against Judge Engoron that she filed Friday with the New York State Commission on Judicial Conduct, a spokesperson for New York State Office of Court Administration has issued a statement.

"Judge Engoron's actions and rulings in this matter are all part of the public record and speak for themselves," said Office of Court Administration communications director Al Baker. "It is inappropriate to comment further."

Rep. Elise Stefanik of New York has filed a judicial complaint against Judge Arthur Engoron.

The letter, addressed to the New York State Commission on Judicial Conduct, largely concerns the judge's rulings in the case and his public statements, and is unlikely to impact the proceedings of the trial.

"Judge Engoron's bizarre and biased behavior is making New York's judicial system a laughingstock," Stefanik, a staunch Trump supporter, wrote.

The lengthy letter echoes some of Trump's attacks on the trial, criticizing Engoron's limited gag order in the case, the actions of his legal clerk, his summary judgment ruling, and his comments during Trump's testimony this week.

"Simply put, Judge Engoron has displayed a clear judicial bias against the defendant throughout the case, breaking several rules in the New York Code of Judicial Conduct," Stefanik wrote.

Former Trump Organization CFO Allen Weisselberg testified that Trump's triplex apartment in Trump Tower is 10,996 square feet -- which is a third the size that Trump claimed on financial documents.

In October 1994, Trump signed a document that certified his penthouse triplex is 10,996 square feet, but his statements of financial condition for several years beginning in 2012 listed the apartment as 30,000 square feet.

An attorney with the New York attorney general's office showed the page with Trump's signature to Weisselberg, who appeared to struggle to explain the discrepancy.

"It was always in my mind a de minimis asset on the statement of financial condition," Weisselberg said. "I never even thought about the apartment."

Louis Solomon of the attorney general's office confronted Weisselberg with emails from Forbes magazine seeking clarity about the apartment's size, as well as a letter signed by Weisselberg certifying the 30,000 square foot figure to the Trump Organization's then-accountant, Mazars USA.

Weisselberg offered a lengthy take on the discrepancy, prompting Judge Arthur Engoron to intercede.

"Your role is to answer the questions, not to give speeches. Please just answer the questions," Engoron said.

"Forbes was right, the triplex was actually only 10,996, right?" Solomon asked.

"Right," Weisselberg finally conceded.

"I've been through quite a bit the last two years," Weisselberg said at one point during the morning's questioning. The former CFO moved to Florida following three months in jail after he pleaded guilty last year to criminal fraud charges and subsequently testified against the Trump Organization.