Democrats must focus on 2020

Every step of the way, Donald Trump has played voters and media with catch phrases of the type favored by Madison Avenue and reality TV, starting with "Make America Great Again" - as if such a task should be left to a New York realtor with a checkered past.

There was "Build the wall" and "Lock her up!" which proved to be as empty as the bank accounts of Trump's failed casinos. And, most notably in...