<Ul> <Li> House elections </Li> <Li> Senate elections </Li> <Li> Gubernatorial elections </Li> </Ul> <P> Congress has two chambers: the Senate and the House of Representatives . </P> <P> The Senate has 100 members, elected for a six - year term in dual - seat constituencies (2 from each state), with one - third being renewed every two years . The group of the Senate seats that is up for election during a given year is known as a "class"; the three classes are staggered so that only one of the three groups is renewed every two years . Until the Seventeenth Amendment to the United States Constitution in 1913, States chose how to elect Senators, and they were often elected by state legislatures, not the electorate of states . </P> <Table> <Tr> <Th_colspan="2"> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> United States Senate elections </Th> </Tr> <Tr> <Td_colspan="2"> <Ul> <Li> 1788 / 89 </Li> <Li> 1790 / 91 </Li> <Li> 1792 / 93 </Li> <Li> 1794 / 95 </Li> <Li> 1796 / 97 </Li> <Li> 1798 / 99 </Li> <Li> 1800 / 01 </Li> <Li> 1802 / 03 </Li> <Li> 1804 / 05 </Li> <Li> 1806 / 07 </Li> <Li> 1808 / 09 </Li> <Li> 1810 / 11 </Li> <Li> 1812 / 13 </Li> <Li> 1814 / 15 </Li> <Li> 1816 / 17 </Li> <Li> 1818 / 19 </Li> <Li> 1820 / 21 </Li> <Li> 1822 / 23 </Li> <Li> 1824 / 25 </Li> <Li> 1826 / 27 </Li> <Li> 1828 / 29 </Li> <Li> 1830 / 31 </Li> <Li> 1832 / 33 </Li> <Li> 1834 / 35 </Li> <Li> 1836 / 37 </Li> <Li> 1838 / 39 </Li> <Li> 1840 / 41 </Li> <Li> 1842 / 43 </Li> <Li> 1844 / 45 </Li> <Li> 1846 / 47 </Li> <Li> 1848 / 49 </Li> <Li> 1850 / 51 </Li> <Li> 1852 / 53 </Li> <Li> 1854 / 55 </Li> <Li> 1856 / 57 </Li> <Li> 1858 / 59 </Li> <Li> 1860 / 61 </Li> <Li> 1862 / 63 </Li> <Li> 1864 / 65 </Li> <Li> 1866 / 67 </Li> <Li> 1868 / 69 </Li> <Li> 1870 / 71 </Li> <Li> 1872 / 73 </Li> <Li> 1874 / 75 </Li> <Li> 1876 / 77 </Li> <Li> 1878 / 79 </Li> <Li> 1880 / 81 </Li> <Li> 1882 / 83 </Li> <Li> 1884 / 85 </Li> <Li> 1886 / 87 </Li> <Li> 1888 / 89 </Li> <Li> 1890 / 91 </Li> <Li> 1892 / 93 </Li> <Li> 1894 / 95 </Li> <Li> 1896 / 97 </Li> <Li> 1898 / 99 </Li> <Li> 1900 / 01 </Li> <Li> 1902 / 03 </Li> <Li> 1904 / 05 </Li> <Li> 1906 / 07 </Li> <Li> 1908 / 09 </Li> <Li> 1910 / 11 </Li> <Li> 1912 / 13 </Li> <Li> 1914 / 15 </Li> <Li> 1916 </Li> <Li> 1918 </Li> <Li> 1920 / 21 </Li> <Li> 1922 / 23 </Li> <Li> 1924 / 25 </Li> <Li> 1926 </Li> <Li> 1928 </Li> <Li> 1930 / 31 </Li> <Li> 1932 / 33 </Li> <Li> 1934 </Li> <Li> 1936 / 37 </Li> <Li> 1938 </Li> <Li> 1940 / 41 </Li> <Li> 1942 </Li> <Li> 1944 </Li> <Li> 1946 / 47 </Li> <Li> 1948 / 49 </Li> <Li> 1950 </Li> <Li> 1952 </Li> <Li> 1954 </Li> <Li> 1956 / 57 </Li> <Li> 1958 / 59 </Li> <Li> 1960 / 61 </Li> <Li> 1962 </Li> <Li> 1964 </Li> <Li> 1966 </Li> <Li> 1968 </Li> <Li> 1970 </Li> <Li> 1972 </Li> <Li> 1974 / 75 </Li> <Li> 1976 </Li> <Li> 1978 </Li> <Li> 1980 </Li> <Li> 1982 / 83 </Li> <Li> 1984 </Li> <Li> 1986 </Li> <Li> 1988 </Li> <Li> 1990 / 91 </Li> <Li> 1992 / 93 </Li> <Li> 1994 </Li> <Li> </Li> <Li> 1998 </Li> <Li> 2000 </Li> <Li> 2002 </Li> <Li> </Li> <Li> 2006 </Li> <Li> 2008 </Li> <Li> </Li> <Li> 2012 </Li> <Li> 2014 </Li> <Li> 2016 </Li> <Li> 2018 </Li> <Li> 2020 </Li> <Li> 2022 </Li> </Ul> </Td> </Tr> <Tr> <Td_colspan="2"> <Ul> <Li> Special elections </Li> <Li> Election disputes </Li> <Li> Results by state </Li> <Li> List of elections in the United States </Li> <Li> House elections </Li> <Li> Presidential elections </Li> <Li> Gubernatorial elections </Li> </Ul> </Td> </Tr> </Table>

Who decides when where and how elections for senators and reps will be held