“I hope this is a very temporary place for the Republican Party,” said Corker. “I hope that very soon we will return to our roots as a party that’s very different, especially in tone, from what we’ve seen coming out of the White House.”

The forgotten Republicans — people like former Florida Gov. Jeb Bush, Arizona Sen. Jeff Flake, South Carolina Rep. Mark Sanford and Ohio Gov. John Kasich — have been unwilling to sit quietly as Trump steers the GOP away from free trade, fiscal responsibility, consistent foreign policy and civility.

Isolation and political exile have been their rewards.

Their diminished roles leave fewer Republican leaders willing to challenge Trump under any circumstances, even in his darkest moments.