The U.S. Senate currently consists of 100 members, 2 from each state, who are elected to serve for a term of 6 years. In the early days of the Senate, Senators were appointed rather than elected. The US Senate is one of the two chambers of Congress in the legislative branch. When the U.S. Senate was created after much discussion through the Federalist Paper 62, from the Virginia Plan, and the "Great Compromise". As a body of the U.S. government, it is steeped in tradition, rules, procedure, and organization regardless of political party.
To see Senate in action today, stream video of floor proceedings from senate.