History, particularly in the last 30 years where political polarization has significantly increased: https://en.wikipedia.org/wiki/United_States_midterm_electi

History, particularly in the last 30 years where political polarization has significantly increased: https://en.wikipedia.org/wiki/United_States_midterm_election#Historical_record_of_midterm https://en.wikipedia.org/wiki/United_States_midterm_election... Trump lost 41 seats in the house in his first term and the administration wasn't anywhere near as polarizing. The voting bloc for mid-terms is very different from presidential elections.