This election featured a contested race for Wisconsin Supreme Court and the presidential preference primary for both major political parties, as well as various nonpartisan local and judicial offices.

The date of this election and deadline to submit absentee ballots became a matter of controversy amid the ongoing COVID-19 pandemic in Wisconsin.

In the Wisconsin Democratic presidential preference primary, Vice President Joe Biden won an overwhelming victory.

The Republican candidate won the special election, causing no change to the congressional delegation's partisan makeup.

[2] With Wisconsin grappling with their own pandemic, state Democratic lawmakers made several attempts to postpone their election, but were prevented by other Republican legislators.

[3] In a joint statement afterwards, Wisconsin's state Assembly Speaker Robin Vos and Senate Majority Leader Scott Fitzgerald criticized Evers for attempting to postpone the election, for not calling a special session earlier, and for reversing his previous position on keeping the election date intact.

On the same day, a separate effort to extend the deadline for mailing absentee ballots was blocked by the Supreme Court of the United States.

[6] However, local media outlets reported that many voters had not received their requested absentee ballots by election day or, due to social distancing, were unable to satisfy a legal requirement that they obtain a witness's signature.

[10][11] They called the election "the most undemocratic in the state's history," adding that it put "at risk everything we've gained from the past three weeks of staying home and keeping our distance.

[11][13] When the election went ahead on April 7, access to easy in-person voting heavily depended on where voters were located.

While wearing medical-like personal protective equipment of gloves, a mask, and full gown, he told reporters that it was "incredibly safe to go out" and vote, adding that voters faced "minimal exposure.

[24][25][27] After reports of missing and undelivered absentee ballots, Wisconsin's Senators Tammy Baldwin and Ron Johnson, as well as the Milwaukee Election Commission, called for investigations.

At the time of the Wisconsin primary, only Joe Biden and Bernie Sanders remained in the field of Democratic candidates.

[31] Joe Biden won the presidential election against Donald Trump and was awarded Wisconsin's ten electoral votes.

These efforts, which culminated in the January 6 riot at the United States Capitol, ultimately failed to overthrow the election results.

In the special election held on May 12, 2020, Republican state senator Tom Tiffany defeated Democrat Tricia Zunker.

While the election was formally nonpartisan, the result of the general election was regarded as a victory for the Democratic Party, as the liberal Democratic Party-backed Karofsky defeated the conservative Republican Party-backed Daniel Kelly, who also carried the endorsement of Republican Party incumbent U.S. President Donald Trump.

The amendment is intended to provide additional rights to victims of crimes, but the language of the Wisconsin referendum was criticized by legal experts as being vague and misleading.

Marathon County supervisor Katie Rosenberg was elected to a four-year term, defeating incumbent mayor Robert Mielke.

The incumbent mayor, Tom Barrett, first elected in 2004, was re-elected to a fifth four-year term, defeating state senator Lena Taylor.

Jake Woodford, a senior administrator at Appleton's Lawrence University, was elected to a four-year term, defeating former city council member James Clemons by a margin of a little over 10 percent.

[68] A supplemental funding referendum was held in the Racine Unified School District at the Spring general election, April 7, 2020.

The local referendum received unusual national attention when it was endorsed by both leading candidates for the Democratic presidential nomination—Joe Biden and Bernie Sanders.

City councilmember Shane Blaser was elected to a two-year term, defeating incumbent mayor Zach Vruwink.