Peter Peterson, a veteran in his 60s, said that while he planned to vote for Mr. Youngkin in opposition to the Democratic agenda, he had noticed Mr. Youngkin’s hesitancy on what Mr. Peterson called his most important issue: election fraud.

“Everyone treats the voting stuff as if it’s a third rail,” Mr. Peterson said. “No one wants to come out and say the vote was stolen.”

Mr. Peterson, who traveled about 100 miles from Virginia Beach for the rally, said he preferred a blunt-force political instrument such as Mr. Trump to candidates who deliver polished speeches. At the Glen Allen rally, polish was in short supply.

Speakers seemed to one-up each other in expressing their loyalty to Mr. Trump: Some called for the arrest of Mr. Biden. Others compared vaccine mandates to conditions in Nazi Germany or invoked violent periods in American history, including the Civil War and the American Revolution, to describe the stakes of upcoming elections.