Peter Beinart: Why are there so few courageous senators?

Now that Donald Trump has been defanged, leading Republicans are rushing to denounce him. It’s a little late. The circumstances were different then, but a year ago, only one Republican senator, Mitt Romney, backed impeachment. In a party that has been largely servile, Romney’s courage stands out.Why, in the face of immense pressure, did Romney defend the rule of law? And what would it take to produce more senators like him? These questions are crucial if America’s constitutiona