Years after being implicated in the DC Madame scandal, it appears that it has finally cost David Vitter an election:

Sen. David Vitter (R-La.) announced Saturday night that he will not run for reelection after losing Louisiana’s gubernatorial runoff election.
Democratic state Rep. John Bel Edwards defeated Vitter, bringing an end to a rough campaign that saw Vitter fall short after entering as the heavy favorite.
The New Orleans Times-Picayune called the race for Edwards just after 10 p.m. Eastern time Saturday night, a little more than hour after polls closed.
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Edwards and Vitter advanced to the runoff after finishing as the top two in the Oct. 24 open primary. In Louisiana’s “jungle primary” system, candidates of all parties run together, with the top two finishers having a runoff if neither one secures 50 percent of the vote.
The well-known Vitter, first elected to the Senate in 2004 after serving in the House of Representatives, was the prohibitive favorite during the early stages of the race. But after sustained attacks targeting his involvement in a 2007 prostitution scandal, he barely defeated two of his Republican challengers and finished in second behind the lesser-known Edwards by 14 points in the jungle primary.
Jay Dardenne, Louisiana’s Republican lieutenant governor, finished fourth in the jungle primary. He crossed party lines to endorse Edwards over Vitter in the runoff.

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In a particularly ruthless ad, Edwards claimed Vitter had chosen “prostitutes over patriots” by skipping a vote to honor fallen soldiers in order to take a call from a prostitute.

I’m not sure why this scandal, which was reputed to involve diaper play on Vitter’s part, has taken so long to for him to pay the price.

My guess is that this is the first time that one of his opponents actually decided to bring it up.