Political survival instinct alone should make GOP want a challenger to Trump

A very real chance exists that Republicans could enter next summer with their political ticket led by an incumbent president tweeting nonsense to distract from an economy in retreat, ISIS terrorists and Iranian mullahs both resurgent, Russia and China enjoying greater spheres of influence, and even his own Justice Department hot on his trail.

Unless a seriously credible opponent begins working now to plan a challenge to President Trump for the Republican presidential nomination, he will win the nomination by default and then drag his whole party down to electoral depths not seen since the post-Watergate lows.