We had a primary election in Washington. All of them were local elections.
Washington does voting by mail. The return envelope is postage-paid and there are drop boxes all over the state. They send out a booklet for every election with all the candidate information in it, including webpages and contact information. It could not be easier to do research and vote.
The turnout was around 21%.
This is why Republicans can be so dominant locally - they can motivate their voters on single issues and drive turnout for Republican candidates. Even a minimal increase in turnout can have an effect. The local city council candidate who is pro-police had a 4% lead on the next candidate with only 96 votes.
While this city I'm in isn't a hotbed of liberalism, it's notable that a lot of city elected officials are Republicans while the state representatives are all Democrats. The state assembly is voted on in even years, with the governor and federal offices.