The Washington legislature’s 18th district is a safely Republican district. Earlier this year, the incumbent for one of the two State House seats in that district said she would not run for re-election. Soon after, six Republicans announced that they would run for the seat (House Seat 18-1). Each Washington state legislative district elects two House members. The two contests are separate from each other on primary and general election ballots. Candidates either file for seat (1) or seat (2). The voters elect one candidate in the 18-1 contest, and one candidate in the 18-2 contest.
Republican Party officials have begun to worry that if there are six Republicans in the primary, the party may lose the seat. Washington is one of two states that uses the top-two system, in which only the two candidates who get the most votes in the primary may be on the general election ballot.
In November 2008 the vote on this seat had been 60.0% for the Republican and 40.0% for the Democrat. Filing doesn’t close until June. If two Democrats file, and there are six Republicans and two Democrats on the August 2010 primary ballot, it is highly likely that the two Democrats will place first and second, leaving no Republican on the November ballot. So a district that leans Republican could have no opportunity to elect a Republican in November, except by write-in vote. See this story. Republican Party officials will wait until they know if two Democrats will file. If two Democrats do file, the party will then undertake an informal process to limit the Republican field. Thanks to Krist Novoselic for the link.