As far as why the superdelegates don't end the nomination process now… I would imagine that the superdelegates want the voters to have a say, rather than suddenly delcare that Obama is the winner and no one needs to vote any longer… I would also imagine that the superdelegates realize that the Clintons will continue to be a powerful force in Democratic (and American) politics so they don't want to tread carefully when it comes to crossing the Clintons… they know there will be some price to pay if they support Obama. I think this is especially true of the US Senators who are undecided… since they have to work closely with Hillary.

At any rate Billary will use Hill's wins in WV today and KY next week as a reason to continue… though I think Hill is just staying in to raise cash to pay herself back, which is fine. Since she has chosen to stay in the race she does need to make some convincing argument to raise that cash.