decided instead to run for Gardner's seat in Colorado's 4th congressional district. Buck won the Republican primary, defeating three other candidates with 44% of the vote. He defeated Democratic nominee Vic Meyers in the general election with 65% of the vote. 2016 Buck ran for reelection unopposed in the Republican primary. He defeated Democratic nominee Bob Seay in the general election with 63.5% of the vote. 2018 Buck ran for reelection unopposed in the Republican primary. He defeated Democratic nominee Karen McCormick in the general election with 60.6% of the vote. 2020 Buck ran for reelection unopposed in the Republican primary. He defeated Democratic nominee Ike McCorkle in the general election with 60.1% of the vote. 2022 Buck won the Republican primary, defeating Robert Lewis. He defeated Democratic nominee Ike McCorkle a second time in the general election with 60.9% of the vote. Tenure Taxation Buck voted in favor of the Tax Cuts and Jobs Act of 2017. He said the bill is "fairer for American families" and that it would "keep more jobs in America." Pandemic response On March 4, 2020, Buck was one of only two representatives to vote against an $8.3 billion emergency aid package meant to help the United States respond to the COVID-19 pandemic. He subsequently voted against the March 14, 2020 Coronavirus Relief Bill that passed the House by a vote of 363–40. While vaccines were approved for use to prevent the coronavirus and being distributed, Buck told Fox News he would refuse inoculation: "I will not be taking the vaccine. I'm an American. I have the freedom to decide if I'm going to take a vaccine or not and in this case I am not going to take the vaccine. I'm more concerned about the safety of the vaccine than I am the side effects of the disease." 2020 election dispute In December 2020, Buck signed onto the lawsuit seeking to overturn the result of the 2020 election. Committee assignments Committee on the Judiciary Subcommittee on Immigration and Citizenship Subcommittee on Antitrust, Commercial and Administrative Law Committee on Foreign Affairs Subcommittee on Oversight and Investigations Subcommittee on Western Hemisphere, Civilian Security, and Trade Caucus memberships Congressional Western Caucus Freedom Caucus Republican Study Committee Second Amendment Caucus Freedom from Big Tech Caucus Political positions 2020 presidential election In December 2020, Buck was one of 126 Republican members of the House of Representatives to sign