Midterm elections are held in the United States every four years, halfway through a president's term. During these elections, voters choose members of the U.S. 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 government. In addition to congressional races, many states also hold midterm elections for governors, state legislators, and local offices. Voter turnout is typically lower in midterm elections compared to presidential elections, but they are crucial for shaping policies and determining the direction of the country.