Freshman Rep. Eric Massa (D-N.Y.) is expected to announce on a 3:30 p.m. conference call that he will not run for a second term in November.
A source who has spoken to Massa said the Congressman will announce he is leaving because of a recurrence of cancer. Massas retirement was first reported by the New York Daily News on Wednesday afternoon.
Massa was first elected in 2008, when he defeated then-Rep. Randy Kuhl in the Republican-leaning 29th district.
Republicans had been targeting Massa for defeat in November, and the race to succeed him will likely be competitive.
He will become the 15th Democrat to announce plans to leave the House at the end of this year.
James Jones, communications director for DC Vote, tapes a "DC Constituents Service Day" sign on the wall as he stands with other DC residents outside of Rep. Andy Harris's office on Capitol Hill to protest Harris' actions against D.C.'s marijuana laws on Thursday, July 24, 2014. DC Vote encouraged DC residents to bring their complaints about city services to the Maryland congressman.