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Anyway, here's your chance to weigh in. Personally, I started off mildly positive about Specter's switch from "R" to "D" but have not been thrilled by several things I've seen since then, including Specter's statement of support for Norm Coleman against Al Franken(!!). More broadly, believe that primaries are almost always healthy for the party, the way we fight for its progressive heart and soul. In that context, I definitely think that a challenge by Joe Sestak to Arlen Specter is at least worth thinking about.