He was re-elected just two months, but significant challengers are already lining up to take on Republican Staten Island Rep. Michael Grimm again in 2014.

The latest is Brooklyn City Councilman Dominic Recchia, who is dropping his bid for Brooklyn Borough President, to explore a run against Grimm, sources said.

“He is still exploring his options,” said a Recchia spokeswoman.

Michael McMahon, who lost to Grimm in 2010, is also looking at the possibility of staging a comeback.

Grimm, whose fundraising practices in 2010 became the subject of an FBI investigation, beat Democratic opponent Mark Murphy last year 53-46 percent.