A key question for tonight: Will Obama show a capacity to cut into Hillary's core constituency groups?

Well, according to early exit polls cited by Fox News, Obama holds a massive lead in Virginia over Hillary among women, 58%-42%.

Other Virginia exits cited by Fox:

Whites: Hillary 51%, Obama 48%

Seniors (another key Hillary constituency): Obama 53%, Hillary 47%

Late-deciders: Hillary 52%, Obama 48%

Young voters: Obama 80%, Hillary 20%

Independents: Obama 66%, Hillary 33%