* A drag on the ticket. Please. Hillary Clinton immediately expands the electoral map putting states in play that are currently out of Obama's reach; West Virginia, Kentucky, and Arkansas. She helps move toss up states to leaning Democrat; New Mexico, Colorado and Nevada (if Obama breaks north of 60% of the Hispanic vote he wins all three, Clinton helps get him there). Clinton helps solidify weak Democratic states including Pennsylvania and Michigan; she can bolster Obama's lead in Ohio and probably makes Florida competitive which it is not currently. Any other VP candidate that can expand the map like this? Not even close.
* Chatterers insist Clinton will be a distraction to your campaign. Exactly what does that mean? That she will be on another page and therefore step on your message? Ridiculous. There is no more disciplined, on message politician in America than Hillary Clinton. But the argument raises a question; why would she want to step on the message? If the message doesn't succeed then you don't succeed, then Hillary doesn't succeed. Why would she want that?
* If you are elected Senator, so the charge goes, the Clintons will be constant problems for you. Hillary will promote her own agenda and Bill will wander the West Wing subverting your presidency. Absurd. When you get sworn in as president your stature will dwarf the Clintons. You have the Oval Office, Air Force One, and loyalists staffing the White House that wouldn't listen to Bill Clinton unless you insisted on it. I'd be surprised if he was in the White House more than a few days each year.
* As for Hillary subverting you, see above. Her political future will be dependent on your success; therefore she has every interest in promoting your agenda. The alternative (without her on the ticket) is much more problematical. She will be a huge force in the Senate with her own base and agenda. Would you rather have her out of the tent on the Hill permoting her own ideas or in your tent promoting yours? Not even a close call.
* By putting Clinton on the ticket you marry up the best money and organizational operations in the history of the Democratic Party. It wasn't her national organization that screwed up it was her supposed brain trust. With her money people committed, a $400 million dollar budget is very doable. Does any other VP choice have an organizational and money base like that? Not even close.