Other key races are in conservative districts held by Reps. Jerry McNerney , D-Calif . ; Gabrielle Giffords , D-Ariz . ; Nancy Boyda , D-Kan . ; Nick Lampson , D-Texas ; Baron Hill , D-Ind . ; Zack Space , D-Ohio ; and Kirsten Gillibrand , D-N.Y. McNerney , Space , Lampson and Gillibrand won seats held by Republicans tainted by scandal .