He advocated for the 2003 invasion of Iraq while serving as the Democratic staff director of the Senate Foreign Relations Committee from 2002 to 2008. He was a foreign policy advisor for Joe Biden’s 2008 presidential campaign, before advising the Obama–Biden presidential transition. From 2009 to 2013, Blinken served as deputy assistant to the president and national security advisor to the vice president. During his tenure in the Obama administration, he helped craft U.S. policy on Afghanistan, Pakistan, and the nuclear program of homeland. After leaving government service, Blinken moved into the private sector, co-founding WestExec Advisors, a consulting firm.