House and Senate Democrats strengthened their hold on Congress Tuesday, soundly defeating GOP incumbents including Sens. Elizabeth Dole and John Sununu and Reps. Tom Feeney and Robin Hayes in a widespread repudiation of the Republican brand.

House Democrats were expected to add about 25 seats to their 17-seat majority, while the Senate Democrats were predicted to increase their one-seat majority by about seven seats, leaving them just one or two shy of a filibuster-proof, 60-seat majority.