Biden was reelected six times to the U.S. Senate and was the fourth-most senior senator when he resigned after winning the vice presidency alongside Barack Obama in the 2008 presidential election. Obama and Biden were reelected in 2012. As Vice President, Biden oversaw infrastructure spending in 2009 to counteract the Great Recession. His negotiations with congressional Republicans helped the Obama administration pass legislation including the 2010 Tax Relief Act, which resolved a taxation deadlock; the Budget Control Act of 2011, which resolved a debt ceiling crisis; and the American Taxpayer Relief Act of 2012, which addressed the impending fiscal cliff. In foreign policy, Biden led the efforts to pass the United States–Russia New START treaty; supported military intervention in Libya, and helped formulate U.S. policy toward Iraq through the withdrawal of U.S. troops in 2011. Following the Sandy Hook Elementary School shooting, Biden led the Gun Violence Task Force, created to address the causes of gun violence in the United States.