Kaul clerked for
Michael Boudin in the
U.S. First Circuit Court of Appeals. From 2007 through 2010, he worked for the law firm
Jenner & Block, and worked as a federal prosecutor in the
U.S. Attorney's office in Baltimore through 2014. In 2014, Kaul moved back to Wisconsin and joined the
Madison, Wisconsin office of the law firm
Perkins Coie.
Attorney General of Wisconsin and U.S. Senator
Tammy Baldwin at a 2022 campaign event In the
2018 elections, Kaul ran for
Attorney General of Wisconsin and defeated the
Republican incumbent
Brad Schimel. Kaul won by a small margin of just over 17,000 votes, but Schimel decided not to seek a recount and conceded defeat on November 19. Kaul became the state's first Democratic Attorney General since his mother's term in office. Kaul was
reelected in 2022, defeating Republican Eric Toney. On June 4, 2024, Kaul announced he was bringing felony
forgery charges against three operatives of
Donald Trump's 2020 presidential campaign who were involved in the
plot to produce fraudulent electoral college votes from Wisconsin. Those charged included
Kenneth Chesebro, a Wisconsin native and the alleged architect of the national fraudulent elector plot,
Jim Troupis, a former Wisconsin circuit court judge who represented Trump in 2020 litigation, and
Mike Roman, a Trump campaign aide and former White House staffer. After governor
Tony Evers announced in 2025 that he would not run for a third term as governor, Kaul contemplated a run to succeed him as governor. Instead, however, Kaul announced in October 2025 that he would not run for governor, and would instead seek a third term as attorney general of Wisconsin in the
2026 election. ==Personal life==