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.

Judge Engoron has set a date of Jan. 11 for closing arguments in the trial.

Both parties face a noon deadline on Jan. 5 to file their briefs, and closing arguments are scheduled to take place in person on Jan. 11, the judge decided after considering scheduling proposals from both the state and the defense.

Engoron said he plans to issue his decision in the case "a few weeks after" closing arguments.

"I would hope this [January] but no guarantees," Engoron said.

State attorneys had requested closing statements take place Dec. 13, while attorneys for Donald Trump suggested closing arguments be presented 60 days after both parties submitted paper filings.