My pal Henry Olsen explains in his recent Telegraph column that Trump is underperforming his polls in recent contests, and appears to be stuck between a very solid floor and a rigid ceiling. Perhaps, but the Telegraph included this graphic, taken from recent Pew polls, that suggests a different picture:

To be fair, a generic Republican ought to be polling about 60 percent of the white vote, and that’s just where Trump is stuck. It would be a delicious irony if Trump wins in November through an increased share of minority votes. It will plunge Democrats into a crisis.