This document provides an overview of American political parties. It begins by defining a political party as a group that organizes to win elections, control government, and influence policy. It then discusses the two major American political parties, the Democrats and Republicans, as being election-oriented. The document outlines some of the key differences between the two parties on issues such as social programs, taxes, abortion, the environment, and more. It also discusses the reasons why the US has developed a two-party system and challenges facing third parties.