From the Washington Post here:
Of the nearly 700 counties that twice sent Obama to the White House, a stunning one-third flipped to support Trump.
Trump also won 194 of the 207 counties that voted for Obama either in 2008 or 2012.
People who voted for Obama once or twice flipped to Trump — you can’t turn and say that race is the primary factor in Trump’s victory is so many Obama voters crossed the aisle.
If Obama had done a better job at doing something for working class and middle class voters, instead of telling them how much he was doing and then not really doing anything for them.
And Obama is doing an awfully bad job at recognizing that his Presidency and the decisions that he made helped bring Trump to the White House.