Senator Hillary Rodham Clinton made a star turn this morning at former President Bill Clinton’s conference on global challenges, calling for a concerted attack on the “feminization of poverty” by destroying cultural, political, and economic barriers that trap women and children in desperate conditions. Before a standing-room-only audience in a ballroom of the Sheraton hotel in midtown Manhattan, Mrs. Clinton gave opening remarks at the conference session “Women and the Power of Economic Opportunity” then moderated a panel that included President Bush’s former secretary of agriculture and three leaders in the development and anti-poverty fields. “Far too many women are...