US 2018 mid-terms in charts: Should Donald Trump be worried?

Donald Trump won't be on the ballot when Americans go to the polls on 6 November, but the elections will shape the rest of his presidency.

Voters will be choosing 35 senators, 36 state governors and all 435 members of the House of Representatives, as well as dozens of local legislative officials.

The elections matter because if Democrats take back control of the House or the Senate from Republicans, they could severely limit what President Trump can do in the final two years of his term.

In the House, analysts predict dozens of seats could change hands and the majority of these are currently held by Republicans.

It's essentially a referendum on Trump

Mid-term elections tend to act as a referendum on the president and that's usually bad news for the party that controls the White House.

Of the 21 mid-terms that have been held since 1934, the president's party has only made gains in the House three times and in the Senate five times.