Politics is about identity

Progressives may not be in charge of the Democratic Party, but they have branded it

The first principle of politics is to do no harm. The second is not to marginalize moderates.

Yet in America, both parties have been drifting the poles for decades — first, the Republicans, and recently the Democrats. But as Democrats have come to be defined by their more liberal flank and by their racial progressives, they have done worse electorally w…