McCarthy received his undergraduate and graduate degrees from California State University, Bakersfield. He assumed congressional office in 2007, and is the Current House Majority Leader. McCarthy is frequently at odds with environmental groups; the League of Conservation Voters has given him a lifetime score of 3%. McCarthy does not accept the scientific consensus on climate change. He was a major opponent of President Obama's Clean Power Plan to reduce emissions of greenhouse gas from coal-fired power plants. He has opposed regulations on methane leaks from fossil-fuel drilling facilities, characterizing them as "bureaucratic and unnecessary.'"] In 2015, McCarthy opposed the U.S.'s involvement in global efforts to combat climate change; and announced that he would oppose an international agreement on climate change. In 2017, McCarthy led House Republican efforts to use the Congressional Review Act to undo a number of environmental regulations enacted during the Obama administration. McCarthy was a supporter of the Defense of Marriage Act (DOMA), which barred federal recognition of same-sex marriage and banned same-sex couples from receiving federal spousal benefits. He has 100% rating from the National Right to Life Committee, and a 0% rating from NARAL Pro-Choice America. He is married with two children.