Trump using Democrat infighting as reelection strategy.

In his video launching his presidential campaign this week, Joe Biden defined the terms of the 2020 presidential race: the soul of America is at stake. Within hours — ignoring Barack Obama’s warning earlier this month that ideological rigidity could turn the Democratic primary process into a circular firing squad — activist groups on the left rose up with guns blazing to take Joe down.

The speed and intensity of the response reminded me of a comment made by my business partner, John White, at the height of the Reagan Revolution…