Midterm elections are held in the United States every four years, halfway between presidential elections. During these elections, voters choose members of Congress, including all House of Representatives seats and about one-third of the Senate seats. These elections can significantly impact the balance of power in the federal government. In addition to congressional races, many states also hold elections for governors, state legislators, and local offices during midterms. Voter turnout can vary, but midterm elections often see lower participation compared to presidential elections, making them crucial for shaping local and national policies.