In 2004, Shrum worked on John Kerry's campaign, guiding him to a victory in the crucial Iowa caucuses and New Hampshire primary, and soon after, the Democratic presidential nomination, only for Kerry to be defeated in the general election by George W. Bush.
Since 1985, Shrum has conceived and produced advertising (TV, radio, print) for twenty-six winning U.S. Senate campaigns; eight winning campaigns for Governor; the Mayors of New York, Los Angeles, Chicago, Philadelphia, Denver, Dade County and San Francisco, and the Democratic Leader of the United States House of Representatives.