He has represented the 44th District in the Texas House of Representatives since winning a special election in December 2010 to fill the seat, which was vacated upon the death of his father, Edmund Kuempel.
He was defeated by Alan Schoolcraft 55% to 45% on May 28, 2024, in the Republican primary runoff.
[5] The Republican party of Guadalupe County, Texas, (Kuempel's home county in Texas) voted to censure Kuempel for his failure to represent the values of his constituents.
Specifically, his vote in favor of the Paxton impeachment, his support of appointing Democrat Chairmanships to critical committees, and for his vote to kill funding for school choice.
[6] However, his decision to vote in favor of Paxton's impeachment was supported by the Libertarian Party of Guadalupe County.