The Material Girl, who announced her support for the Arkansan and former NATO commander last month, detailed Clark's qualifications in a letter released Wednesday on her Web site, www.Madonna.com. "Thankfully, there is now a candidate running for president who is committed to ensuring that our country lives up to its promise and its people," Madonna said. Madonna, who calls England home, said she had never before aligned herself with a presidential candidate during the primary season. She said she supported the former four-star general "not only as a 'celebrity' but as an American citizen and as a mother. "I want...