The upper chamber of Congress, in which each state has two representatives regardless of population size, with 100 senators total. Senators serve six-year terms, with one-third of them running for reelection every two years.
The House is supposed to represent the people, and its members each represent an approximately equal number of citizens.
The Senate is supposed to represent the individual states, each state has two Senators. This gives the least populated state, Wyoming, the same power in the Senate as the most populated state, California.
I think that is the answer.
