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Elections occur in every even-numbered year for some federal and most state and local government offices in the United States. Some states and local jurisdictions hold elections in odd-numbered years.
Thus, every four years, Americans elect a president and vice president. Every two years, Americans elect all 435 members of the U.S. House of Representatives and approximately one-third of the 100 members of the U.S. Senate. Senators serve staggered terms of six years each.