For reference, the 3.68M figure is based on Nov 1 registrations. Voter turnout is calculated as a proportion of eligible voting-age population, which was estimated at 4,536,417. 3.24M/4.54M = 71.3% or ~4%age points higher than 2016. https://elections.wi.gov/elections-voting/statistics/turnout https://twitter.com/ChrisRaab3/status/1324076225606881283

WI did not have 89% turnout. The "3.68M" stat comes from a note on WI Election Commission's site about (1) total registered voters on Nov 1. However, WI has same-day registrations (2), & voter turnout is calculated based on eligible voting-aged population (3). 3 different numbers

There was an active GOTV operation that probably everyone in WI can testify was extremely annoying. We also had massively expanded early voting and absentee voting. If anything, only a 4%age point bump seems fairly low, unless that remaining 29% was truly unlikely to vote at all

Honestly, if you were hunting for a conspiracy, you might point to that 71% as being surprisingly low. Doesn't prove anything by itself, but it might be worth probing into how many ballots across the state were rejected. Either way, turnout definitely wasn't too \\high\\.