Sen. Cory Booker (D-NJ) went on CNN on Thursday morning to claim that “we do not need more evidence to come to the conclusion that Trump violated his oath of office.”

In making this claim, Booker cited Trump’s “prolific tweeting,” and his silence as his followers tried to find then-Vice President Mike Pence and Speaker of the House Nancy Pelosi during the Capitol riots last month.

“They literally were saying they were taking direction from him. They were reading his tweet publicly out to other rioters as they chanted, ‘Hang Mike Pence,” Booker said. “I do not understand how you cannot look [at] this prolific tweeting that went on and then the silence afterward. This is a president that knows how to tell people to stop.”

“I don’t know how you can’t look at the fact that it was well known that the riotous, murderous mob was in the Capitol for an hour plus, and then the two things you hear from the president is one, him replaying his own speech on Twitter and then telling the mob that Mike Pence had failed them,” he added.

“It is hard to even venture to say that the commander-in-chief who swore an oath to protect this sacred space did not fail in his duty, did not betray that oath,” Booker concluded. “We do not need more evidence, in my opinion, to come to the conclusion that … Donald Trump violated his oath of office.”

This comes as Trump’s impeachment trial is ongoing in the Senate, with the former president being accused of inciting the Capitol riots last month. He was already impeached by the House over this for a second time last month, but it remains to be seen whether Democrats will be successful in impeaching him in the Senate.

Earlier this month, Booker released a statement calling for the Senate to impeach Trump, saying that “it brings me no satisfaction to come to this conclusion. And yet we all swore an oath to  ‘support and defend the Constitution of the United States.’”