The new Congress is likely to put new and stronger emphasis on limiting junk food marketing, say aides to U.S. Sen. Tom Harkin, D-Iowa. Harkin becomes chair of the Senate Agriculture, Nutrition and Forestry Committee in 2007. His aides report that food marketing to children "will be one of our top tier agenda items." In recent years, Harkin futilely has sought to push through legislation toughening Federal Trade Commission authority to regulate junk food marketing.