Vaughn was a member of House of Delegates from January 8, 2003, until January 11, 2017. He was appointed the Deputy Majority Whip in 2006 and was a member of the House Economic Matters Committee. Vaughn was also the chairman of that committee's science & technology subcommittee. He was a member of the
Legislative Black Caucus of Maryland and chairman of the Legislative Black Caucus' foundation. He is also Co-Chair of the Task Force on Lending Equity in Financial Institutions Providing State Depository Services.
Legislative notes • Voted for the Clean Indoor Air Act of 2007 (HB359) • Voted against slot machines in 2005 (HB1361) • Voted for the Tax Reform Act of 2007(HB2) • Voted in favor of in-state tuition for students who attended Maryland high schools for at least two years. (HB6)(2007) (HB6) • Sponsored House Bill 30 in 2007, allowing the state to confiscate unused portions of gift certificates after four years. ==Awards==