What does "Hamilton" have to do with trade policy? More than you might think in the case of acting U.S. Trade Representative Stephen Vaughn, who counts himself among the hit Broadway musical's legions of fans.Vaughn, a history buff as well as a trade lawyer, says he has long admired Alexander Hamilton, especially the Founding Father's 1791 “Report on Manufactures,” which argued in favor of government action to help U.S.