Senate: 59 Ds, 36 Rs
House: 311 Ds, 117 Rs
Senate: 70 Ds, 23 Rs.
House: 322 Ds, 103 Rs.
Senate: 75 Ds, 16 Rs.
House: 334 Ds, 88 Rs.
Senate: 70 Ds, 22 Rs
House: 256 Ds, 173 Rs.
These all come at the beginning of each term and carry us through January, 1941. So, for his first two terms, FDR’s smallest majority in the Senate was
21 23 and his average majority was 44.
In case you missed that: his average majority was 44 (bolded just f@#$#$$ because).
Number of votes needed to invoke cloture in the Senate during FDR’s first two terms: 64. So, for three out of four Congresses during FDR’s first two terms, he had a filibuster-proof majority.
In the House, FDR’s smallest majority was 83 and his average majority was 186.
Yes, he had to deal with a lot of conservative Southern Democrats during this period who would be Republicans now. You can, however, lose a lot of people and still win the vote when your majority is in the “Holy @#$#, How Large Is Your Majority?” range.
It’s easier to be a great President when your party owns the legislative branch.
[Updated to add cloture numbers]