With Name-Calling and Twitter Battles, House Republican Campaign Arm Copies Trump’s Playbook

“I hope the lesson the N.R.C.C. draws from that is to not do it again,” Mr. Gallagher said.

Representative Adam Kinzinger, Republican of Illinois and another veteran, told Politico: “The president’s got his own unique style. I don’t think we need to mimic it.”

When Mr. Rooney saw the statement on Twitter, reposted by a Fox News reporter, he publicly expressed his disappointment with Mr. Emmer, calling out the committee chairman and commenting, “This isn’t you.” Mr. Pack, the chief spokesman for the committee, chimed in, “No, that’s Max Rose.”

Mr. Rooney shot back: “That’s not what I’m referring to. Maybe there’s a better conservative argument to counter his support of this legislation than calling him ‘little.’ At least that would be my advice to my 13-year-old.”

The exchange is only one of the Twitter scrapes that has spilled into public view. While committee messaging is, by nature, meant to attract the attention of the news media — especially among local outlets in battleground districts — party insiders have worried they have not attracted the right kind of attention.

When Jill Burcum, an editorial writer for The Minneapolis Star Tribune and a Pulitzer Prize finalist, took issue with the committee’s depiction of Mr. Schiff as a clown, Mr. Pack responded on Twitter. Using the same motley photo, he reiterated that Mr. Schiff was a “socialist clown” and added, “Don’t let your apparent bias blind you from that fact.”

When the committee called a little-known Air Force combat veteran who is running for Ohio’s First Congressional District a “socialist loser,” it struck a nerve: A columnist for The Cincinnati Enquirer panned the attack on the veteran, Nikki Foster, who flew missions over Iraq and Afghanistan, as “G.O.P. desperation.”

“In doing so, the congressional Republicans’ fund-raising arm brought attention to a candidate no one knew about. Why even go there?” the columnist, Jason Williams, wrote.