Reagan speech writer Peggy Noonan says in a Wall Street Journal essay:

“Republicans are now in the habit of editing their views, and they’ve been in it for 10 years. The Bush White House suppressed dissent; talk-radio stars functioned as enforcers; the angrier parts of the base, on the Internet, attempted to silence critical thinkers. Orthodoxy was everything, or orthodoxy as some defined it.

This isn’t loyalty, it’s lockstep. It has harmed the party’s creativity, its ability to think, when now more than ever it has to. Enough.”