Senators represent their entire states, but members of the House represent individual districts. The number of districts in each state is determined by a state's population. Each state has a minimum of one representative in Congress.

What is the Senate's role?

The Senate has the sole power to confirm those of the President's appointments that require consent, and to provide advice and consent to ratify treaties. There are, however, two exceptions to this rule: the House must also approve appointments to the Vice Presidency and any treaty that involves foreign trade.

What's the difference between a congressman and a senator?

For this reason, and in order to distinguish who is a member of which house, a member of the Senate is typically referred to as Senator (followed by "name" from "state"), and a member of the House of Representatives is usually referred to as Congressman or Congresswoman (followed by "name" from the "number" district of ...