Sen. Thom Tillis (R-NC) voted with Democrats against Joe Kent, the administration’s controversial nominee to be director of the National Counterterrorism Center, though Kent was nevertheless confirmed on Wednesday with support from all other Senate Republicans.

Kent has come under scrutiny for past links to white supremacists and neo-Nazis, promotion of conspiracy theories and echoing of pro-Russia talking points, as well as his opposition to the U.S. strikes on the Houthis, though those issues did not feature prominently in his confirmation proceedings.

Tillis told Jewish Insider he voted against Kent because of his past comments on the Jan. 6, 2021 attack on the U.S. Capitol. Kent has defended rioters involved in the attack, claimed the FBI was involved in the attack and said it should be dismantled.

 “It’s the Jan. 6 tripwire,” Tillis said. “I don’t even get to the other things that I think probably add an argument. People make comments about conspiracy theory, all that stuff — [Jan. 6] is a red line for me. … I take personal[ly] dismissing something that endangered police officers. So — that simple.”

Tillis has declared his opposition to other Trump nominees for similar reasons, including effectively torpedoing the nomination of Ed Martin to be U.S. attorney for Washington, D.C.

Some Democrats raised concerns about Kent’s extremist ties ahead of the vote.

“I am deeply alarmed that Republicans are charging ahead to put it under the thumb of a conspiracy theorist who espouses white supremacist views, and is patently unqualified for this important role in just about every way imaginable,” Sen. Patty Murray (D-WA) said on the Senate floor. “There’s his track record chumming it up with white supremacists, from discussing campaign strategy with avowed white supremacist Nick Fuentes, to giving an interview to a guy who has defended Hitler, to rallying with the founder of a far-right paramilitary group, and let’s not forget the Proud Boy that he hired as a consultant!”

Democrats also raised concerns about reports that he had sought to manipulate intelligence reports to align with the administration’s political preferences.

Democratic Majority for Israel said that “We cannot trust someone who echoed Kremlin propaganda, courted white nationalists, and invoked antisemitic tropes. The Senate must reject him.”

Sen. Tom Cotton (R-AR), the chair of the Senate Intelligence Committee, said on the Senate floor, “Mr. Kent has 20 years of military service and 11 combat deployments during the war on terror, as well as experience as a Green Beret and a CIA officer. Mr. Kent has dedicated his career to fighting terrorism and keeping Americans safe.”

He also highlighted the fact that Kent’s wife was killed while serving in Syria.