The same day, Ms. Powell said in a Fox Business Network interview: “This is essentially a new American revolution. And anyone who wants this country to remain free needs to step up right now.”

Mr. Flynn tweeted a link to a news release from an Ohio-based conservative group that called on Mr. Trump to invoke “limited martial law” and hold a new election. Mr. Wood on Parler agreed Mr. Trump “should declare martial law.”

On Nov. 19, Mr. Giuliani called for the Justice Department to get involved, saying at a news conference at the Republican National Committee headquarters: “What do we have to do to get the FBI to wake up?”

At a “Stop the Steal” rally around this time in Alpharetta, Ga., Mr. Wood told the crowd: “We’re going to slay Goliath, the communists, the liberals, the phonies. Joe Biden will never set foot in the Oval Office of this country. It will not happen on our watch. Never gonna happen.”