Tom Allen Challenges Susan Collins for Maine's Senate Seat

Rep. Tom Allen (D-Maine) announced Tuesday that he will challenge Sen. Susan CollinsSusan CollinsStoddard: Can Trump close the deal with the GOP? The Trail 2016: And then there was one Maine Republican senator suggests she could back Trump MORE, who is considered one of the most vulnerable Republicans, in 2008.

"Maine and America face unprecedented challenges," Allen said in this video announcing his run. "For the last six years, the Bush Administration, supported by a Republican Congress, has failed the American people."

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