About: Primary challenge

In U.S. politics, a primary challenge is when an incumbent holding elective office is challenged by a member of their own political party in a primary election. Such events, known informally as "being primaried," are noteworthy and not frequent in the United States, as traditionally political parties support incumbents, both for party unity and to minimize the possibility of losing the seat to an opposing party. In addition, officeholders are frequently seen as de facto leaders of their party, eligible to establish policy and administer affairs as they see fit. A primary challenge thus interferes with this "spoil of office," and is largely discouraged. Though typically used to describe challenges to elected officials, the term is also applied to officeholders such as appointed U.S. senator