Running in House District 12 in 2010, White unseated the Democraticincumbent, Jim McReynolds, 20,958 (57.6 percent) to 15,405 (42.4 percent).[2] Switched to District 19 in 2012, White unseated in the Republican primary the 10-year incumbent Mike "Tuffy" Hamilton of Lumberton in Hardin County. White polled 10,190 votes (54.5 percent) to Hamilton's 8,503 (45.5 percent).[3] White then ran without Democratic opposition in the general election held on November 6, 2012.[4]
In 2013, White voted against a bill to allow certain minors to consent to receiving immunizations (the bill passed the House 71–61).[5] In August 2021, amid the COVID-19 pandemic in Texas, White spoke at an anti-vaccine mandate rally at the Texas State Capitol.[6] The next month, White filed a bill to ban government entities from requiring private businesses to require vaccinations, and barring businesses which require employees to provide proof of vaccination from receiving state grants or contracts.[7][8]
In 2017 and 2019, amid a national and statewide debate over the removal of Confederate monuments and memorials, White introduced bills that would restrict the removal of historical public monuments and memorials (including, but not limited to, Confederate monuments).[9][10] White's 2017 bill called upon the Legislature, State Preservation Board, or Texas Historical Commission to find another "prominent location" whenever any monument on state property "for military, war-related or other historical service" was moved, and would have established fines and jail time for violators.[9] White's 2019 bill would ban monuments erected more than 40 years ago from being "altered, moved, relocated, renamed or destroyed" and would ban the alteration, relocation, or destruction on monuments between 20–40 years unless a local referendum or a state Legislature vote to do so passed.[10]
In the general election held on November 6, 2018, White overwhelmed his Democratic opponent, Sherry Williams, 49,926 (83.2 percent) to 10,070 (16.8 percent).[11]
White was the sole African-American Republican in the Texas Legislature.[12]Texas Monthly described him in 2019 as "rock-ribbed conservative in good standing with the right" who is also a leading advocate of criminal justice reform within the Texas Republican Party.[12] White introduced legislation to update the Sandra Bland Act (a state law named after Sandra Bland, who died in a Texas jail shortly after being arrested at a traffic stop) by limiting arrests for minor misdemeanors; the measure did not pass.[12]
In June 2021, White announced that he would not seek re-election to the Texas House in 2022,[13] and announced that he was running for Agriculture Commissioner instead, challenging incumbent Republican Sid Miller in the Republican primary.[14][15][16]
On October 19, 2021, White expressed his opinion about same-sex marriage in a letter to Texas Attorney General Ken Paxton. White noted that Texas laws "continue to define marriage as the union between one man and one woman" even after the U.S. Supreme Court decisions of Obergefell v. Hodges and De Leon v. Perry. He also expressed his opinion that, while federal court decisions prohibit "state officials" from enforcing these state laws, nothing prohibits "private citizens" from declining "to recognize homosexual marriages." In his letter, he requested that Paxton affirm this principle.[17]
On August 11, 2022, White resigned from his seat in the Texas House to take the position as executive director of the Texas Funeral Services Commission.[18]