reelection in 2006. 2008 Butterfield defeated Dean Stephens with 70.28% of the vote. 2010 Butterfield defeated Republican nominee Ashley Woolard with 59.31% of the vote. 2012 Butterfield defeated Republican Pete DiLauro with 75.32% of the vote. 2014 Butterfield defeated Republican Arthur Rich with 73.38% of the vote. 2016 Butterfield defeated Republican H. Powell Dew Jr. with 68.62% of the vote. 2018 Butterfield defeated Republican Roger W. Allison with 69.85% of the vote. 2020 Butterfield defeated Republican Sandy Smith with 54.18% of the vote. Committee assignments Committee on Energy and Commerce Subcommittee on Communications and Technology Subcommittee on Energy Subcommittee on Health Committee on House Administration Subcommittee on Elections Caucus memberships Congressional Black Caucus (first vice chair for the 113th United States Congress; chair for the 114th United States Congress) United States Congressional International Conservation Caucus Congressional Motorcycle Safety Caucus Congressional Out-of-Poverty Caucus Butterfield served on the House Committee on Energy and Commerce, and formerly served on the House Armed Services Committee and the House Agriculture Committee. He was the Region VIII representative on the House Democratic Steering and Policy Committee. Beginning in 2007, in the 110th Congress, Butterfield was chosen to serve as one of eight Chief Deputy Whips for the House Democratic Caucus. Chief Deputy Whips assist in the formulation of Democratic policy and ensure the passage of legislation by maintaining good communication with members. He was appointed to this position by Speaker Nancy Pelosi and Majority Whip Jim Clyburn. Political positions As a member of the House Committee on Energy and Commerce, Butterfield advocated for the American Clean Energy and Security Act. He supports "a market-based approach to capping carbon emissions" and wants to broaden the United States' sources of energy. On his website, Butterfield stresses the need to find more clean and domestic sources of energy. A strong supporter of civil rights, Butterfield advocated renewal of the Voting Rights Act and "introduced a bill calling for the Capitol Visitor's Center to acknowledge the slave labor used to build the Capitol." Originally endorsing John Edwards for the 2008 Democratic Party presidential nomination, Butterfield endorsed Barack Obama in January 2008. In 2009, Butterfield introduced the Don't Let the Bed Bugs Bite Act "to assist states in carrying out inspections of lodging facilities, train inspection personnel, contract with a commercial exterminator; educate owners and staff at lodging facilities." He also passed H.R. 4252 "[t]o amend the Small Business Act to