The US midterm elections are being held on Tuesday, 6 November 2018. Midterms are held half-way between presidential elections (in the middle of a four year presidential term, hence the name). The national component of the midterms – the vote for Congress – is what receives the most attention. All 435 seats in the House of Representatives are contested every two-years and a third of Senate seats every six-years (so, a third of the Senate is elected with the House every two years). Votes are also held for several state and local positions. In 2018, elections for governors will be held in 36 states and 3 territories.
The Democrats have taken back the House of Representatives, "turned blue" a number of governorships and state legislatures, and already started discussions about investigations into President Trump and even impeachment.