U.S. government, Congress is composed out of the Senate and the House of Representatives. Both are elected with a per-state representation, with the House of Representatives larger and with multiple people per state.
20180410/https://en.wikipedia.org/wiki/Senate
20180410/https://en.wikipedia.org/wiki/House_of_Representatives
20180410/https://en.wikipedia.org/wiki/United_States_Congress
20180410/https://en.wikipedia.org/wiki/United_States_House_of_Representatives