Two of what represent each state in congress?

Each state is represented in the U.S. Congress by a minimum of three (3) persons: two (2) senators and one (1) representative.

Congress consists of two "houses" known as the House and the Senate. The Senate has 100 "seats" because there are 50 states in the nation. The number of senators from each state is always two (unless, of course, there is a vacancy due to death, resignation, etc.). Obviously, if there were another state added to the U.S., the Senate's membership would be 102.

The House of Representatives has 435 voting members. This number has remained constant for many decades now, although it can be changed by Congress. The formula for apportioning the seats to each state is basically as follows. First, take the U.S.'s total population (from the census) and divide that by 435. (For sake of an example, let's assume that the 2010 census counts about 300 million people. Dividing that by 435 would come to about 690,000.) Each state with a population no greater than that would be allotted one (1) seat. The states with populations greater than the 690,000 would be assigned the number of seats roughly equivalent to their respective populations. (A state with a population of about 4.5 million, for example, would receive six seats.)