100 Seats!!
That last time America saw a change in power of this scope, was when the southern delegation walked out to form their own nation.
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It hasn’t been that long, 1894 saw more than 100 seats change hands.
And the back to back elections of 1918 and especially 1920 combined had nearly that many switch.
“And the back to back elections of 1918 and especially 1920 combined had nearly that many switch.”
THAT was a reaction to the FIRST Progressive President (Obama is the 3rd/4th depending your bookkeeping). Woodrow Wilson ran, as a College Professor, in 1912; among other things, he pledged to keep the U.S. out of the likely war in Europe. Instead, he got the U.S. directly into WWI with a great loss of American lives.
What about 1932?