35 of 100 seats up for election
All 435 seats up for election
As well as deciding which party controls Congress, the US midterm elections on Tuesday will also determine state governors.
These key figures have enormous power, as many aspects of American life – from education to abortion rights – are decided at the state level.
Some 36 states will decide their next governor in these elections. And some of them could have an impact on national politics – here’s why.