Rep. Michael Grimm (R), who won re-election to New York's 11th Congressional District in November, will resign that seat effective at the end of the current Congressional term on January 5, 2015. He will not be sworn in as a member of the 114th Congress term that begins next Tuesday, January 6th, 2015.
Grimm plead guilty to a felony count of filing a false tax return on December 23rd, a result that will likely lead to jail time for Grimm.
Once Grimm leaves office, the seat will be vacant until a special election is held. By New York law, the governor (Andrew Cuomo (D)) will announce a date for a special election, which will be 70 to 80 days after the date he makes the announcement, but no later than next November's general election. (This time period was extended from 30 to 40 days in 2011, to provide ample time for overseas military personnel to cast their ballots).
Grimm won a third term in Congress in November, defeating Democrat Domenic Recchia by 13%, a surprisingly large margin in this competitive district. Absent the incumbent, the special election will likely be hard-fought by both parties.