Swing Left is a progressive political organization based in Washington, DC, founded in January 2017. Its main goal is to help Democrats win elections by focusing on competitive swing districts that influence the balance of power in government. As a Hybrid PAC, Swing Left emphasizes grassroots participation, aiming to maximize the impact of volunteers and donors in key elections.

The organization mobilizes over one million members who have raised more than $140 million for Democratic candidates and civic organizations. Swing Left provides volunteer training for voter registration, phone banking, and canvassing efforts. It also utilizes data and technology to direct resources effectively to the most competitive races. Additionally, through its Vote Forward platform, Swing Left enables volunteers to send handwritten letters to encourage voter registration and turnout, having sent over 40 million letters since 2018. The organization is committed to fostering long-term civic engagement and empowering individuals to contribute to Democratic victories.