Bardella announced his withdrawal from the conference after claiming Bannon made a "gesture referring to Nazi ideology" during a speech on Thursday. Bannon was accused of giving a Nazi salute after he extended his right arm out with palm facing out after his address, though he has denied the claim.

Steve Bannon, after calling for Trump to be President for life, did a Nazi salute on stage at CPAC. Nazism has officially taken over the GOP. The few remaining conservatives have a choice: either leave the party and obstruct it—or choose to be complicit. pic.twitter.com/94o5Kj69Le

The gesture comes as Trump and his allies have prompted growing alarm among critics about their embrace of authoritarian messaging and symbols.