What was one effect of the Reagan Revolution in 1980? Democrats won the majority of seats in the US Senate. Republicans lost seats in the US House of Representatives. Republicans won four new governors' offices across the nation. Democrats established a set of policies called the "Contract with America."

Republicans won four new governors' offices across the nation

In the elections of 1980, thirteen of the fifty state governorships were up for election. Four state governorships changed hands from Democrat to Republican. Republicans also won the majority of the seats in the Senate for the first time in 28 years

It's C.