#13 A couple of things to note here:
The Republican presidential primary in WA was cancelled in 2004 when Bush was running for re-election:
Presidential preference primaries were held in 1992, 1996, 2000, and 2008. The 2004 presidential preference primary was cancelled.
Washington is one of those states that has both caucuses and primaries. From what I can tell the Democratic caucus in 2012 wasn't cancelled but the Democratic primary was:
WA parties set caucus dates for 2012
Due to budget constraints, the voter-initiated state presidential primary is being suspended for 2012. Since lawmakers approved the Initiative to the Legislature back in 1989, the Democrats have never used the results to allocate delegates to the national convention, relying on the traditional caucuses, which were not abolished when the primary was created. Republicans have typically used both caucuses and primary results to determine their delegate split.
Since Democrats only use the results of the caucuses to determine delegates for the DNC convention, the primary was cancelled that year. Republicans us a combination of the two:
A broad cross-section of voters participate in the Presidential Preference Primary, which is preferable to the party caucus system, where fewer voters participate. However, the political parties are legally entitled to ignore the results of the presidential primary, so it becomes merely a beauty contest. Therefore, due to the state's fiscal situation, the cost savings outweigh the benefits of holding the primary.