James David Margolis (born April 30, 1955) is an American political consultant and communications executive based in Washington, DC. He served as an advisor to Barack Obama in both his 2008[1] and 2012[2] campaigns for the White House. Margolis is a partner at GMMB, Inc.,[3] a strategic communications firm and advertising agency.[4][5] Previously he served as chief of staff to US Senator Kent Conrad,[6] chief of staff to US Congressman Howard Wolpe,[7] and Deputy Director of Communications for Vice President Walter Mondale's presidential campaign.[8]