Senate Democrat Tammy Baldwin won re-election Tuesday because she outperformed her party’s standard-bearer, Kamala Harris, across most of Wisconsin, but especially in smaller counties where former President Donald Trump made his biggest gains and in election wards with lower incomes and lower rates of college education.

Voters in Wisconsin are heading to the polls Tuesday to cast their votes in a critical presidential swing state that also in deciding which party controls the Senate. The winner in the presidential race will take the state's 10 electoral votes.Polls close at 8 p.m. local time.

Wisconsin Democratic U.S. Sen. Tammy Baldwin pledged to work with President-elect Donald Trump when possible in her victory speech, but also vowed to fight him to protect the national health care law and abortion rights.