A former president of the club for growth won't win a election in any democrat state. And Pennsylvania voted for the D's candidate for president in 1992, 1996, 2000, 2004 and 2008.
Stop tempting fate. Toomey will likely win as it is...pretending Specter's a shoo-in ignores his very real vulnerability. Given that most of the electorate, right and left, view him as an opportunistic phony and, as Mr. Moderate pointed out, Dem turnout will be suppressed by an uncompetitive governor's race, Specter's in the race of his career. Not even Arlen Specter could invent up a magic bullet better designed for ending his career.
It's definitely a stupid idea for Democrats to pretend that Specter can't lose. They should have learned that from the Massachusetts special election. I hope they do take that position, though I strongly doubt they will.
As things are right now I'm reasonably confident that Toomey will win, but it's a long time until November.