Washington

I didn't realize the swing tended to go the other way outside Seattle. I wonder if it correlates at all with drop box use? (Which I would guess probably correlates with drop box availability.). That varies a great deal by county.

https://www.sos.wa.gov/elections/data-research/reports-data-and-statistics/ballot-drop-box-usage-year

In Seattle so many people are close to a drop box if you're in a demographic that tends to procrastinate it is easy to rationalize "I'll just get it to a drop box" as election day nears.

I wonder if a meaningful number of "procrastinators" just don't end up voting at all because they live somewhere that it's more of a hassle to get in the mail or a drop box? And when you miss one election, the non-voting habit tends to repeat.