Former Republican Virginia Rep. Denver Riggleman told CNN's "State of the Union" on Sunday that he views the attack on the U.S. Capitol on Jan. 6, 2021, as an attempted coup by former President Trump. The big picture: Riggleman said people around Trump had an "awareness" of what they were doing when they repeated "propaganda" and "conspiracy theories" that preceded the riot and mainlined "insanity into people's heads." Riggleman, a former adviser to the select panel investigating the Jan. 6 riot, said he no longer considers himself a Republican. "I think the party left me some time ago," he said.