Devin LeMahieu

Devin LeMahieu (born August 8, 1972) is an American businessman and Republican politician from Sheboygan County, Wisconsin. He is the current majority leader of the Wisconsin Senate, since 2021, and has represented Wisconsin's 9th Senate district since 2015. He previously served nine years on the Sheboygan County board of supervisors. His father, Daniel LeMahieu, served 12 years in the Wisconsin State Assembly.

Early life, education and career Devin LeMahieu was born in Sheboygan, Wisconsin, and has lived most of his life in the Sheboygan area. He graduated from Sheboygan County Christian High School in 1991, and went on to attend Dordt College, in Sioux Center, Iowa; he earned his bachelor's degree in 1995 with a double major in business administration and political science. In 2006, he made his first bid for public office, running for an open seat on the Sheboygan County board of supervisors. He won the election without opposition and went on to serve on the board for the next nine years.

LeMahieu made his first run for the Wisconsin Legislature in 2012, when he launched a primary challenge against Republican incumbent Mike Endsley in the 26th Assembly district. In announcing his run, LeMahieu stated that his campaign wasn't intended as opposition to any particular policy or vote from Endsley, but was merely an acknowledgement that the district had been significantly reshaped by the 2011 redistricting act—the 26th district had previous been concentrated in the city of Sheboygan and the neighboring village of Kohler; the redistricting split Sheboygan between the 26th and 27th districts to gerrymander the Democratic residents of Sheboygan out of any chance at Democratic legislative representation, and the 26th district took on vast portions of southern Sheboygan County, including LeMahieu's home in Oostburg. LeMahieu ultimately fell short in the primary, receiving 40% of the vote. This time, LeMahieu faced no opponent in the primary and went on to the general election against Democratic candidate Martha Laning. The 9th Senate district then comprised most of Sheboygan and Manitowoc counties and part of Calumet County, and was a safely Republican seat; LeMahieu prevailed with 60% of the vote. LeMahieu was easily re-elected in 2018.

He opposes the legalization of medical and recreational marijuana in Wisconsin. He argued Wisconsin would be a "rogue state" if it were to legalize medical marijuana and that there was no "actual science behind it."

In January 2022, LeMahieu said that the Republican-led legislature would not confirm any of Tony Evers's appointees for the rest of Evers's term in office. Evers and LeMahieu were both re-elected to their offices in the 2022 general election, since that time, some of Evers' nominees were subsequently confirmed by the Wisconsin Senate.

On March 19, 2026, LeMahieu announced that he would not run for re-election in the 2026 election.

Electoral history Wisconsin Assembly (2012) Year Election Date Elected Defeated Total Plurality 2012 Primary Republican 5,144 59.93% Rep. 3,427 39.93% 8,583 1,717

Wisconsin Senate (2014–2022) Year Election Date Elected Defeated Total Plurality 2014 General Republican 43,186 59.95% Dem. 28,770 39.94% 72,035 14,416 2018 General Republican 44,680 58.47% Dem. 31,684 41.47% 76,409 12,9962022Primary Republican16,96371.36%Rep.4,34210.23%23,77012,621Rep.2,43118.27% General Republican 57,836 93.64% Dem. 1,237 2.00% 61,765 56,599