After Donald Trump won with the most diverse coalition in history, desperate NYT columnist says Democrats need to double down on identity politics and divide America even further.

Alex Christy: Professor/NYT columnist Tressie McMillian Cottom urges Dems to double down on identity politics "[Trump] tapped into one of the most powerful of American identities, he tapped into white identity...That means you should double down on identities of your base."