Buehler was the unsuccessful Republican Party nominee for Oregon Secretary of State in 2012, losing to incumbent Secretary of State Democrat Kate Brown with five candidates on the ballot.
Buehler won election to the Oregon House of Representatives in 2014, defeating Democrat Craig Wilhelm. In his first session as a lawmaker he was the primary author of a new law which allows women in Oregon to buy oral contraception over the counter without a doctors prescription. Buehler was re-elected in 2016, narrowly defeating Democrat Gena Goodman-Campbell. Buehler describes himself as a moderate and his pro-choice stances on abortion have been a source of political tension "from left and right." In July 2016, Buehler received a 65% rating from the American Conservative Union, although by November of that year it had dropped to 58%. In November 2017, Knute Buehler was the first Republican to call for the resignation of fellow Republican State Senator Jeff Kruse following multiple allegations of sexual harassment.
Ethics violations
The Democratic Party of Oregon Chair filed three ethics complaints against Buehler in the spring of 2017 regarding his campaign finance disclosures for the last four years. Two claims were dismissed by a state ethics committee. Buehler avoided civil penalties in the third complaint by acknowledging his violation of an Oregon statute which requires listing of all income received over $1,000 from any source as part of a state-mandated Letter of Education, along with restating his finance declarations retroactively to 2013. Buehler said the censure was "politically motivated," the original filers claimed that "he continues to hide income."
Gubernatorial campaign
Almost immediately after his re-election, Buehler was considered a front-runner for the Republican nomination to run for governor in 2018. Republicans claimed Democrats were already working to undercut Buehler through legislative committee assignments. On August 3, 2017, Buehler announced he would run for Governor of Oregon in the 2018 election. On May 15, 2018, Buehler won the Republican nomination for Governor of Oregon to face off against Democratic incumbent Kate Brown in November 2018, in a rematch of the 2012 Secretary of State election. Buehler lost the general election to Kate Brown by 6.4% Both Brown and Buehler raised and spent record amounts in their campaigns.
Political positions
State Rep. Buehler is a fiscally conservative moderate Republican. He is pro-choice on the issue of abortion. On immigration, he opposes sanctuary cities and opposes Oregon's statewide sanctuary policy. He supports gay rights, including same-sex marriage, and voted to ban conversion therapy from being used on minors. Buehler said during the gubernatorial campaign that he supported Oregon's capital punishment law which was passed by Oregon voters in 1984.