(CNN) - Incumbent Democratic Rep. Dan Maffei has conceded the race for his House seat in New York's 25th Congressional district to Republican challenger Ann Marie Buerkle.
Buerkle's win gives Republicans a net gain of 63 seats in the House. It also makes New York the state with the most GOP House pickups– six districts changed sides in the 2010 midterms. Republicans picked up five seats in Ohio and Pennsylvania respectively.
New York still has one Congressional race undecided– the 1st District race between Democratic incumbent Timothy Bishop and Republican Randy Altschuler. Two other House races remain unresolved in California's 20th and 11th districts.
Maffei said in a statement, "I congratulate Congresswoman-elect Buerkle and her supporters and family. I wish her luck in the new Republican majority. "
In a press conference Tuesday, Buerkle credited her grassroots supporters with helping her capture the win.
"We came from nowhere and we worked hard and we put together one by one a coalition of people who believed in me." Buerkle said.