72nd Congress(1931-33) House--216 Dems, 218 Reps, 1 Ind
73nd Congress(1933-35) House--313 Dems, 117 Reps, 5 Ind
74nd Congress(1935-37) House--322 Dems, 103 Reps, 10 Ind
75nd Congress(1937-39) House-- 333 Dems, 89 Reps, 13 Ind
76nd Congress(1939-41) House--262 Dems, 169 Reps, 4 Ind
After FDR took office in 1933, the Rep gains were marginal in the House. It was only in 1939 that they were able to get the Dems below 300. FDR actually increased the Dem margins in the House until 1939.
Point is, they weren’t eradicated, even with ALL that political patronage. Read Burt Folsom’s book, “New Deal or Raw Deal” about how FDR funneled massive amounts of money to specific house and senate races. My point is that even at the very worst time, with the economy against them, with the Hoover taint still on them, with FDR pulling out all the patronage/spoils stops . . . they still hung in and by 1939 had 2/5s. I think that’s remarkable, almost as remarkable as the Dems hanging on from 1861-1877.