Question

Only 1/3 of its members are ever up for reelection at one time.

Neither
Senate
House of Representatives
Congress

Answer 1

Senate

Step-by-step explanation:

Members of the House of Representatives serve two-year terms and are considered for reelection every even year. Senators however, serve six-year terms and elections to the Senate are staggered over even years so that only about 1/3 of the Senate is up for reelection during any election.