Zachariah Sippy had this information in the Princeton Election Consortium:

One of the most notable partisan gerrymanders in the country can be found in Wisconsin. But a repeat of the offense in 2021 can be prevented – with public input. 

Governor Evers has formed a nonpartisan citizen commission to increase transparency and collect public input, regardless of whether the legislature intends to bypass him or not. If you are a Wisconsinite, we encourage you to make your voice heard. While Evers’ commission won’t have the final say, having your voice on the record could play a key role in potential future litigation. 

In 2011, with a “trifecta” (single-party control of the state assembly, senate, and governorship), Wisconsin Republicans drew a map that assured them legislative control for the decade. 

Read the full article through this link. Also see related Democracy Chronicles articles like those on Redistricting, Election History, or even seen our section on American Democracy.