This article could have been re-written almost word for word describing the Democrats. 

Their recent election for Democratic party president, etc., featured all the people the older white base (that should be supporting the Democrats, and did in fact vote for Obama) being shunted aside to continue to focus on the LGBT, Black and other identity groups.

The Democrats can "penetrate" these groups (who tend to live in large cities), and increase their margin of victory from 70% of the vote, to 80% and beyond, but it will do little to help them win Iowa, and Indiana, etc.