Wedge issue

A wedge issue in politics is any issue used to create a division within a political party. These issues are usually employed as a tactic by a minority party against a governing majority party, with the aim of splitting the majority's electorate into two or more camps. Although any issue could potentially be used as a wedge, some of the most common examples are often concerned with social justice, such as abortion or civil rights. Due to the prevalence of social justice issues as a wedge, the tactic is often most effectively employed by Conservative parties against Liberal parties. American political strategist Lee Atwater has been noted as an early champion of wedge issue politics during the Reagan era.