AL HUNT, BLOOMBERG

The Pennsylvania exit polls are revealing. They show Clinton underperforming Obama among voters younger than 30. Worse from her perspective, those voters comprised only 16 percent of the overall tally, compared to 19 percent in 2012. More telling, blacks, who voted overwhelmingly for Clinton, were only 10 percent of the electorate, down from 13 percent last time. If black voters had made up 12 percent of the Pennsylvania electorate, she probably would have won the state.