When pressed, Ms. McDaniel said that some G.O.P. resolutions and statements needed to be disavowed, citing Oregon’s false flag resolution. “I know our state party chairs are doing the best they can to represent their voters, but that statement goes too far,” she said.
And she expressed regret about letting Rudolph W. Giuliani, the former president’s personal lawyer and the former mayor of New York, and Sidney Powell, another member of Mr. Trump’s legal team who spread conspiracy theories, hold a news conference at the R.N.C. headquarters in Washington.
“When I saw some of the things Sidney was saying, without proof, I certainly was concerned it was happening in my building,” she said. “There are a whole host of issues we had to deal with — what is the liability of the R.N.C., if these allegations are made and unfounded?”
Despite the attempts of Ms. McDaniel, who remains closely allied to Mr. Trump, to bring the party together, many lifelong Republicans feel that there is no place for them in it.
In Washington State, Chris Vance had for years dedicated himself to the Republican movement as both a politician and as the party chairman. But in 2016, when he ran unsuccessfully for Senate, he found himself in conflict with many Republican voters in his state, who disagreed on issues including trade agreements, immigration and the role of NATO. That disconnect has only grown over the past four years, he said.
“They are intent on being a Trump cheering society,” said Mr. Vance, who has since left the party. “I don’t think the party can be saved. I think it needs to be broken up, smashed and blown to bits.”
Some Republican strategists said that when Democrats in Congress began trying to pass legislation, it would become easier for Republicans to remember they are on the same team.