These numbers seem a little hinky - not only is the MoE pretty portly, but half undecided? No other poll has shown the Democratic electorate that indecisive. More interesting are Specter's favorables, which sunk from 48-24 in March (before his switcheroo) to just 31-37 now. His job approvals have also crashed (52-37 to 34-55) as did his re-elects (40-46 to to 28-57).
Is this just a weird outlier? Or have Pennsylvanians grown seriously discontent with Arlen? Either way, I still maintain that he'd be very vulnerable to a Sestak primary - and if there's any truth to these numbers, Specter's in a world of trouble.