because recession are part of the buisiness cycle and will be blamed on them. It looked like dems would be a permanent majority in 08 and they collapsed in 2010. Even after 36 it looked like dems would be a permanent majority yet by 52 reps had a trifecta.
Aside from what OSR said, this doesn't seem like an accurate representation of the GOP's reality post-Depression. Of the 64 years between 1930 and 1994, they held the House for a combined
4 years. The Senate for 12. A person living at the tail end of that reign should be forgiven for calling the GOP a permanent minority party, imo. Given that the time period you stated came after an incredibly tumultuous 20 years of a Democratic White House, it's not surprising that their grip on power was not absolute.
Also I find it's better to just interpret the word "permanent" as an exaggeration. There are no truly permanent majority parties. Just parties that maintain a strong hold on power for a long time. Possibly generations, but not forever.
Also, fwiw, there is this book that was tragically published in 1994
:
