While Article II, Section 1, Clause 1 of the United States Constitution sets the U.S. President's term of office to four years, Article I, Section 2, Clause 1 sets a two-year term for congressmembers elected to the U.S. House of Representatives. Article I, Section 3, Clause 1 then sets a six-year term for those elected to the U.S. Senate, with Clause 2 dividing the chamber into three "classes" so that approximately one-third of those seats are up for election every two years.[5]