Since Kathleen Blanco would be dead in the water is a nonstarter (my apologies for the distasteful phrase I used previously) in a bid for a reelection as Louisina Governor, this is good news for the Dems, via Charlie Cook:

Former Democratic Sen. John Breaux is seriously considering a bid for Governor of Louisiana. John Maginnis, editor of the highly regarded Louisiana Political Fax Weekly, initially reported the news this morning, and the Cook Political Report has independently verified that it is true. Apparently Democratic Gov. Kathleen Blanco has privately indicated a willingness to step aside if Breaux, or possibly another Democrat, such as Rep. Charlie Melancon, would run instead.

None of this is a done deal, but Breaux is serious, and his candidacy would change the face of the race for Democrats.

Breaux would win imo.