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Electability watch

Clinton has gotten a bump in the polls since Pennsylvania. In the latest AP/Ipsos poll, she leads McCain, 50%-41% (Obama leads him 46%-44%).

Here's yet another Wisconsin poll that shows Obama besting McCain -- but McCain beating Clinton.

The Wall Street Journal's Calmes looks at Obama's potential trump card: elected superdelegates who view Clinton's negatives as too high to have at the top of the ticket.

While there's still more GOPers who think Clinton and not Obama is the easier downballot target, NRCC's Cole has been the consistent dissenter on this issue and is betting that Obama and not Clinton will be the bigger drag. Politico: "Republican-leaning districts could be particularly fertile ground for Obama-focused attacks, GOP officials say. 'I think he's the weaker candidate, and I've thought that for over a year now,' NRCC Chairman Tom Cole (Okla.) said at a briefing on Monday. 'He's very inexperienced. He is by any definition liberal and to the left of Hillary Clinton, and he will give us plenty of ideological divisions to work with.'"

"Besides the two special congressional elections in Mississippi and Louisiana next month, Republicans believe they can also exploit Obama's vulnerabilities in House battlegrounds where he has struggled to win over key demographic groups. Those areas include three culturally conservative seats in Pennsylvania, where Obama lost badly in last week's primary, and three Cuban-American districts in Florida that Democrats are seriously contesting for the first time."

And in our veepstakes watch… Haley Barbour says he's too conservative to be McCain's running mate. "Barbour also urged Mr. McCain, the presumptive Republican presidential nominee, not to name his pick for vice president until after the Democrats' convention, when he can draw the sharpest distinction between the parties. Mr. McCain will depend on 'persuasion' to snare independents and disgruntled Democrats on Nov. 4, unlike George W. Bush in the 2000 and 2004 presidential elections when victory depended on maximizing the turnout of each party's hard-core partisans, said Mr. Barbour, a former Republican National Committee chairman."