Argentina`s first couple, a power pair often compared to Bill and Hillary Clinton, won`t say whether it will be a his or hers candidacy in this year`s presidential election. President Nestor Kirchner boasts soaring approval ratings amid an economic recovery. His wife, Sen. Cristina Fernandez de Kirchner is also popular — and unlike Sen. Hillary Rodham Clinton, she established her own political career long before her husband became president. With both Kirchners doing well in the polls, they`ve been floating the idea that she should run to succeed him while he`s still in office. Cristina Kirchner flew off without her...