Largely on the basis of George Stephanopoulos' sources, ABC is reporting intermediaries from the Obama and Clinton campaigns are discussing the formation of a dream ticket with Hillary as veep. While the logic of trying to assuage Clinton's base and unify the party is understandable, I've never understood how or why people think this would work.

In many ways, putting Clinton on the ticket would be a disaster for the Obama brand. How is he going to "change our politics" if he chooses as his running mate a woman (and her husband - it's always a 2 for 1, remember?) who personifies exactly the kind of politics he's trying to change? It's antithetical to the rationale of his entire campaign.

And even if the move helps bring home a percent or two more Democrats this fall who might have otherwise defected, putting Clinton on the ticket would almost certainly hurt Obama's appeal among Independents. It could easily work out to be a wash for Obama - or worse - especially since McCain will be competing hard for those same centrist voters this fall.

So despite all the talk, I don't see it happening. But if we've learned anything this political season, it's that anything is possible.