N. Korea one party voting habits must be popular in Washington.
In the case of Washington-state it's because of a desire for
zero-party rule. Washington was one of those states (along with California and Alaska) that had employed the blanket primary, in which a person can choose to vote in the Democratic primary for Governor and the Republican primary for Senator, etc. That was ruled unconstitutional in the 2000 case
California Democratic Party v. Jones. The nonpartisan blanket primary that was already in use in Louisiana was adopted by referendum. Effectively, the only race that remains partisan in Washington is the presidential race, which gives another possible way to rule - the 5% threshold now can be met or set only by the Presidential race, and the Democrats and Republicans have major party status because of the result in that race.
