Freed from the prospect of running for re-election, Tennessee Sen. Bob Corker is finally telling the world what he (and allegedly many of his Republican colleagues) really think of the current White House occupant.

One might be tempted to pat the senator on the back for this act of political courage. But it’s worth remembering that he endorsed Trump in 2016 and therefore is at least partly responsible for the rolling fiasco at 1600 Pennsylvania Ave. And it was only after he no longer faced paying a price at the ballot box that he called out Trump.

This, and the fact that few Republicans in either chamber are willing to challenge an unstable chief executive, make this a profile in cowardice.