members of congress already in office are called
Member of Congress In referring to a lawmaker in their capacity of serving in Congress the term Member of Congress is used less often than other terms in the United States. This is because in the United States the word Congress is used as a descriptive term for the collective body of legislators, from both houses of its bicameral federal legislature: the Senate and the House of Representatives. 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 "state"), or Representative ("name" from the "number" district of "state"). Although Senators are members of Congress, they are not normally referred to and addressed as "Congressmen" or "Congresswomen" or "Congresspeople".