Biedermann defeated incumbent Doug Miller, chairman of the Special Purpose District Committee, on May 24, 2016, in the Republican primary runoff election.

[4] Biedermann also voted to end benefits for illegal immigrants as well as penalizing employers who do not use E-Verify and allow law enforcement to check the legal status of detained individuals.

Biedermann describes himself as pro-life, voting on numerous pieces of legislation to restrict or prohibit the practice of abortion in the state of Texas.

He voted against HB 486, a bill that would have made it easier for school districts to raise property taxes without first getting voter approval.

[13] During the primary campaign, a photo surfaced of Biedermann dressed up as Gay Hitler, a recurring Saturday Night Live character portrayed by Chris Kattan, for a charity event in 2008.

[15] In January 2017, Biedermann sent a survey to Muslim leaders asking them questions about their interpretations of Islam in preparation for a "Homeland Security Summit".