MIDTERM elections are currently underway as voters across the USA are taking to the polls. But do you have to vote for your party or can a Democrat vote Republican?
The House of Representatives is the lower chamber of Congress, while the Senate is the upper chamber.
Smaller states like Delaware and Vermont will only have one representative, but bigger states such as California will have 53 representatives.
Representatives serve two year terms and stand for relation every even year.
They also serve six-year terms, with elections being held over even years.
This means only a third of the Senate will be up for reelection during any elections.