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Arlen Specter didn’t watch last night’s GOP debate, but he definitely heard about it.

Having been out of the news for some time, the former senator from Pennsylvania was briefly mentioned on the stage in Arizona as Mitt Romney blamed his chief rival, Rick Santorum, for his 2004 endorsement of the senator who became a Democrat and voted for President Obama’s signature health care plan that’s so hated by conservatives.

Specter, a Democrat who became a Republican for decades before returning to the Democrats again just briefly, said Thursday that he’s happy to take credit for “ObamaCare” — but that he doesn’t understand why Romney mentioned him in the first place.