The Washington Post's Chris Cilizza has downgraded the Maine senate race to #10 in a list of Senate sets likely to change hands this fall. Once regarded one of the most competitive races in the nation, the Allen- Collins matchup is now pretty universally regarded as a might-have-been for Democrats:

10. Maine: There is a simple fact dominating this race: voters like Sen. Susan Collins (R) and overwhelmingly approve of the job she has done in the Senate. Unlike some Republican incumbents working hard of late to distance themselves from President Bush, Collins has a long record of moderation. Rep. Tom Allen (D) is a good candidate and has a very solid team around him. But, it's hard to see why voters would fire Collins. (Previous ranking: 9)