This is interesting. Polls had Rudy doing good against Gillibrand:

Former Mayor Rudy Giuliani is expected to announce Tuesday he is not running for U.S. Senate or anything else in 2010, effectively ending his storied – and often stormy – electoral career, The Daily News has learned.

The announcement, at which he’ll also endorse Republican Rick Lazio for governor, marks the end of a year-long political dance by Giuliani, who mulled bids for governor and then Senate before backing away from both.

I can only suspect that Rudy isn’t doing this so he can get all his 9/11 references in order for another run at the big show in 2012.