Neil Newhouse, co-founder of Public Opinion Strategies, a polling firm known for its work with Republican candidates, called Mr. Stepien a “no drama kind of guy,” adding that the shift signaled that the Trump campaign realizes it is in trouble.

“They’ve hit the emergency flasher in the campaign,” Mr. Newhouse said. “It’s an indication that they realize exactly where they are, they realize the urgent need to turn this around, and they’re sending out signals that that’s what they plan to do.”

Read more here about the campaign manager chosen to bring Trump back for 2020.