 DuWayne Gregory, the Presiding Officer of the Suffolk County Legislature, ran for the Democratic nomination.The 3rd district is based along the north shore of Long Island and includes portions of Nassau and Suffolk Counties.The incumbent, Democrat Steve Israel, had represented northern Long Island since 2000 (as the 2nd district from 2000 to 2012 and the 3rd district since then) and announced he would not seek re-election on January 5, 2016.