Call described his tax and environmental policies as "muscular progressivism". Doggett was a frequent critic of former Speaker Newt Gingrich while allying with David Bonior, the Democratic whip, when Bonior was leading "an effort to diminish Gingrich's power by raising continual questions about his ethics." He has been a close ally of Nancy Pelosi. In 2002, he supported her successful bid for Democratic leader over fellow Texan Martin Frost, a more moderate candidate. On the local level, Doggett helped ensure the development of the Austin Outpatient Clinic, which opened in 2011 as the largest veterans' clinic of its kind in the country. In 2014, he secured passage of legislation to expand the Missions National Park and supported it being named a UNESCO World Heritage Site. Doggett has long supported more open government, and is also a leading advocate for campaign finance reform. On the Ways and Means Committee, he has sought to close many overseas tax shelters. Doggett has authored legislation to create tax incentives for plug-in hybrid electric vehicles and to create a nationwide Silver Alert system. From 2011 to 2016, he served as ranking member of the Human Resources Subcommittee and in 2017 became ranking member of the Tax Policy Subcommittee. His priorities there included education, health care, preventing child abuse, reducing prescription drug prices, fighting poverty, and eliminating multinational tax shelters and loopholes. Abortion Doggett is pro-choice. In 2003, he voted against a bill that would have banned all late-term procedures erroneously called partial-birth abortions. He was given a 100% by the NARAL. He voted in favor of a bill to provide federal funding for embryonic stem cell research in 2007. Environment Doggett supports environmental preservation. He is one of the leading opponents in the House of drilling for oil in the Arctic National Wildlife Reserve in Alaska. The League of Conservation Voters gave Doggett a 100% rating, an indication that he supports the group's interpretation of environmental preservation. In the 110th Congress (2007–08), he wrote climate change legislation that would have gone further to reduce greenhouse gases than bills his party's leaders supported. In June 2009, Doggett voted for the American Clean Energy and Security Act, a bill that would have established an emissions trading system for American producers of carbon dioxide. He said, "It has been a difficult and significant decision". "I just decided that I will have a better chance to make changes later