wave election

[ weyv i-lek-shuhn ]
/ ˈweɪv ɪˌlɛk ʃən /

noun Politics.

an election in which one party makes significant gains in Congress, at the state level, or in a parliament: a wave election that saw Republicans win control of the House and flip seven Senate seats.

Origin of wave election

First recorded in 2010–15
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019