It was the kind of question that a politician should have been able to handle with ease, but Representative Steve King is not any politician.

“Do you think a white society is superior to a nonwhite society?” Mary Lavelle, 63, asked, testing his reputation for white supremacist sympathies.

“I don’t have an answer for that. That’s so hypothetical,” Mr. King, Republican of Iowa, told her. “I’ll say this, America is not a white society — it has never been a completely white society. We came here and joined the Native Americans.”

He continued: “I’ve long said that a baby can be lifted out of a cradle anywhere in the world and brought into any home in America, whatever the color of the folks in that household, and they can be raised to be American as any other. And I believe that every one of us, every one of us, is created in God’s image.”