For those interested, Josh Kurtz had an extremely interesting piece in Roll Call yesterday on the New York Mayoral race, and specifically Democratic Congressman Anthony Weiner's chances [link, but paid registration is required]. Here's the crux of the story:

As he edges closer to running for mayor of New York in 2005, Rep. Anthony Weiner (D) says he will use as a model the last Congressman who was elected mayor of Gotham: Ed Koch.

"My campaign will be evocative of how Ed Koch got elected,"Weiner said in a recent interview. "He didn't win any county [in the city]. But he was the second choice in every county."

Koch also operated largely under the radar as better-known opponents got into the race, eventually winning by appealing to middle-class voters of various ethnicities.

"I'm going to sell myself as a five-borough fighter for New York," Weiner said.

[...]

Because the 40-year-old Congressman doesn't have to sacrifice his House seat, he can keep his job while using this campaign to build name recognition for another try in 2009 if he loses this time - much as Koch, a Democrat who backed President Bush in 2004, built on an aborted run for City Hall in 1973 to win four years later.

Other notable New York mayors, including Fiorello LaGuardia (R) and John Lindsay (R), have also progressed from Capitol Hill to City Hall.

An interesting piece, you should definitely check out the rest if you have the subscription or access to the LexisNexis news search.