The spread in West Virginia
Hillary Clinton is expected to win the West Virginia primary by a handsome margin. Indeed, Barack Obama has not only cleared out of the state having campaigned there in the most perfunctory fashion but is also not planning to make any remarks after the results come in tonight.
Seeing as a big Hillary victory is already factored in, her margin tonight would have to be pretty stunning to have any effect at all on the process. Indeed, to really do anything to stop the press treating Obama as the de facto nominee, which he pretty much is regardless of what happens tonight, or give the ever shrinking number of undeclared super-delegates more than a moment's pause, she’s going to have to get more than two thirds of the vote or him less than a quarter of it.