LOS ANGELES, California (CNN) --The Material Girl has stepped onto the political stage and endorsed Democratic presidential hopeful Wesley Clark. "I think he has a good handle on foreign policy, I think he's good with people, and I think he has a heart and a consciousness," pop singer Madonna said. "He's interested in spirituality -- I mean, those things mean a lot to me." The singer and children's book author met Clark a few weeks ago for over an hour. In an interview recorded last week with CNN's Denise Quan, Madonna said they discussed his becoming president. The singer told...