New Jersey Senator Cory Booker is scheduled to testify against Senator Jeff Sessions on Wednesday. The move is believed to be without precedent, as Booker will become the first sitting senator to testify against another sitting senator in a cabinet post confirmation hearing.

"I'm breaking a pretty long Senate tradition by actually being a sitting senator tomorrow testifying tomorrow against another sitting senator," Booker said during a recent interview on MSNBC. "Please understand I think these are extraordinary times and they call for extraordinary measures."

Some have noted that Booker's decision to testify against Trump's Attorney General nominee is strange considering the praise the Senator heaped upon Sessions just last February. At the time, Senators Booker and Sessions had worked together to pass legislation that awarded those who participated in the 1965 voting rights march the Congressional Gold Medal.

"And so this is truly one of my life's greatest moments," Booker said at a 2016 ceremony. "I am humbled to be able to participate here and pay tribute to some of the extraordinary Americans whose footsteps paved the way for me and my generation. I feel blessed and honored to have partnered with Senator Sessions in being the Senate sponsors of this important award."

Check out Senator Cory Booker praising Senator Jeff Sessions below: