Queens Senator Hiram Monserrate has been expelled by the State Senate following a vote of 53-8.
The resolution takes effect immediately.
Sources say there were two resolutions being considered by lawmakers earlier tonight. One called for an immediate expulsion, the other would have delayed it until June.
Monserrate was convicted in October of misdemeanor assault for dragging his girlfriend through the lobby of his apartment building.
The committee that investigated him recommended the State Senate vote on a resolution to expel Monserrate and if that were to fail, to vote on a resolution censuring him.
Monserrate says he will challenge the vote in court, saying only his constituents can vote him out of office.