Republican Candidates for U.S. Senate 2004
12 Republican incumbents  - all re-elected 14 Democratic incumbents - 1 defeated
3 Republican open seats (CO, IL, OK) - 1 held 5 Democratic open seats (FL, GA, LA, NC, SC) - 0 held 

AL-Sen. Richard C. Shelby AK-Sen. Lisa Murkowski AZ-Sen. John McCain AR-Jim Holt challenger
CA-Bill Jones challenger CO-Pete Coors open R CT-Jack Orchulli challenger FL-Mel Martinez open D
GA-Johnny Isakson open "D" HI-Cam Cavasso challenger ID-Sen. Mike Crapo IA-Sen. Chuck Grassley
IL-Alan Keyes open R IN-Marvin Scott challenger KS-Sen. Sam Brownback KY-Sen. Jim Bunning
LA-David Vitter open D MD-E.J. Pipken challenger MO-Sen. Kit Bond NV-Richard Ziser challenger
NH-Sen. Judd Gregg NY-Howard Mills challenger NC-Richard Burr open D ND-Mike Liffrig challenger
OH-Sen. George Voinovich OK-Tom Coburn open R OR-Al King challenger PA-Sen. Arlen Specter
SC-Jim DeMint open D SD-John Thune challenger UT-Sen. Bob Bennett VT-Jack McMullen challenger
WA-George Nethercutt challenger WI-Tim Michels challenger

Compiled by Eric M. Appleman/Democracy in Action.