Former City Councilman Carl DeMaio announced Tuesday that he will not run for mayor of San Diego and instead continue his previously announced candidacy for Congress in 2014. DeMaio lost to Bob Filner in November of 2012 in a close race.

Also announcing that they had decided not to seek the mayor's job in the special election in November were city council president Todd Gloria and county supervisor Ron Roberts.

Meantime, former 2012 mayoral candidate Nathan Fletcher formally announced Tuesday what was expected, that he will run for mayor in the special election this November.  Fletcher, who is a former state assemblyman, changed from a Republican to an independent last year and then became a Democrat.

Former city attorney Mike Aguirre also has joined the race, announcing on KOGO that he was planning to run.

City councilman Kevin Faulconer was scheduled to announce his plans on Wednesday.

The special election to elect the new mayor is set for November 19th. If no candidate gets more than 50-percent of the votes, then a run-off election will be held between the top two vote-getters within 49 days after the special election.