Romney will be 'John Quincy Adams-esque' senator: Senior adviser

A senior adviser tells ABC News that Romney wants to build consensus in D.C.

“Adams had three public roles: He was a great Secretary of State, great one-term president, but he was even a better member of Congress when he became senator in a very contentious Congress in those days - and was a consensus builder and was praised for it,” Kaufman added.

Kaufman also said Romney, like Adams, will work to be a consensus builder in Washington, building on his years as the Republican governor of Massachusetts, when he worked with a state legislature controlled by Democrats.

“I think these men and women that get elected as a senator, representative or president know what is spoken in the blood sport of a campaign is different than what is spoken in the halls of Congress or the White House,” Kaufman said.

Trump has called Romney a “fool” a “mixed-up man who doesn’t have a clue” and “one of the dumbest and worst candidates in the history of Republican politics."

Kaufman also cautioned against characterizing Romney’s run as solely about speaking out against President Trump.

“He’s running to be the senator from Utah not the senator of the country. He’ll do the right thing,” Kaufman said.