A list of U.S. national political parties maintained by Project Vote Smart.

Supported and maintained by the Democratic National Committee.

The official campaign arm of the Democrats in the House of Representatives.

"Committed to electing a Democratic Senate"

Works with every Democratic member of the House of Representatives to help achieve consensus, bring their ideas and work to the forefront and ensure members have the tools they need to implement their goals. It is the only subgroup within the House of which every Democrat is a Member.

An advisory board to the Democratic Leadership and as a research, policy-formulating, and communications arm of Senate Democrats.

"A forum for writers, scholars, and Democratic and progressive leaders, we engage our members and guests in discussions and advocacy for public policy that advances our nation’s democratic values."

An independent voluntary political organization organized to support Democratic governors and candidates across the nation.

Works to win state legislative seats and chambers for Democrats.

A national political organization formed to support the election of Democrats to the office of attorney general in all of the states and territories of the United States.

A forum to give Democratic Mayors a place to reflect their own unique views and objectives as the leaders of American cities.

"The mission of the Young Democrats of America is to elect Democrats, advocate for progressive issues, and train the next generation of progressive leaders."

"We seek to build a party and government controlled by citizens, not corporate elites-with policies that serve the broad public interest, not just private interests."

Official website of the Republican Party.

Serves as an advisory Committee to House Republicans and provides a forum for Republican Members to discuss legislative proposals before the House.

Responsible for electing the House Republican leadership, approving GOP Member committee assignments, and developing a communications strategy to reach out to all Americans.

A political committee devoted to increasing the Republican majority in the U.S. House of Representatives.

The organization of Republican members in the U.S. Senate that helps senators communicate their priorities directly to the American people through a wide variety of communications resources.

Advances Republican policies by providing positions on legislation, floor debate, and votes. RPC also provides in-depth analysis on specific issues, policy solutions and alternatives, and strategic guidance.

The nation’s original and largest organization representing gay conservatives and allies who support fairness, freedom, and equality for all Americans.