Democrats have an enthusiasm problem. Big time.

The enthusiasm deficit for key members of the Obama coalition (68% who say they are almost certain to vote) versus other voters (85%).

That’s up four points from April, when 64 percent said the same. But it’s still lagging far behind other voting groups, a combined 85 percent of whom say they are almost certain to vote. The new 17-point gap is up from 15 in April and 11 in March of last year.