[10] In the final days before the election, Karofsky was endorsed by both the remaining 2020 Democratic Party presidential primary candidates—former Vice President Joe Biden and U.S.

[11][12] The election set a spending record for any Wisconsin Supreme Court race, with the two candidates raising a collective $10 million.

The ads falsely claimed Karofsky, as deputy district attorney, struck a plea deal with a man charged with sexual assault of a minor resulting in no jail time.

[15][16] On April 6, 2020, Milwaukee County Circuit Judge Timothy Witkowiak blocked Karofsky's injunction against the ads on the grounds of unlawful prior restraint.

[17] The nonprofit fact checking site PolitiFact included the false claims against Karofsky it its yearly "Pants on Fire" review for 2020.

[21] In keeping with her marathon hobby, on August 1, 2020, Karofsky was sworn into office following the thirty-fifth mile of an "ultramarathon," by Wisconsin Supreme Court Justice Rebecca Dallet in a ceremony also attended by former governor Jim Doyle.

As a result, she and Judge Rebecca Dallet, who also voted with the majority, were attacked in print and on social media with antisemitic and misogynistic comments and threats.