Swing states, also known as battleground states, are regions in the United States where both major political parties have similar levels of support among voters. These states can play a crucial role in determining the outcome of elections, as they are not consistently won by one party. Candidates often focus their campaigns on swing states to gain the necessary electoral votes. In presidential elections, swing states can vary from one election cycle to another. Examples of swing states include Florida, Ohio, and Pennsylvania. The voting patterns in these states can shift based on various factors, including demographics, economic conditions, and key issues that resonate with voters.