Wolf Blitzer pushed the idea that Obama would be VP nominee for Clinton last week at that debate but it makes no sense when Obama has his own fundraising network of 650,000 (probably over a million by the convention) donors worth hundreds of millions of dollars. He can send an email to a portion of his list and raise $100,000 for a Democratic candidate overnight ($10 from just 10,000 people!) and have that chit to call in later. He doesn't need to be Vice President and he would be making a mistake to meld his donor network into the Clinton network. It would be an insane mistake.