Over 35 million voters nationwide have already cast their votes in 2018 US midterm early voting, according to NBC.

Millions more will head to the polls on Tuesday, in an election that is considered to be a verdict on Donald Trump's two-year-long presidency.    

The US midterm elections take place every two years. This year, all 435 seats in the House of Representatives and 35 of the total 100 seats in the Senate are up for grabs. 

36 states will also be voting to choose their new governors. 

Polls open on November 6, but the exact time varies depending on the state, most polling stations open at 6 a.m. local time.

Currently, President Trump's Republican Party controls the House of Representatives and the Senate, which make up the US Congress.

However, this year, polls have shown a lead for the Democratic Party.

The Democrats need at least 23 more seats to reach the majority mark of 218 in the 435-seat House of Representatives.

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State of the race: Trends clearer for midterm elections as November nears

US Midterms: Social media battle, history give Democrats an edge