SINGAPORE (Reuters) - Defense Secretary Donald Rumsfeld warned on Friday that China's failure to match economic freedoms with democratic reforms could raise tensions and undermine its growing influence in the world. On way to a regional security conference that is expected to focus on China and North Korea, Rumsfeld drew a stark contrast between China and India, the world's largest democracy, which America is courting as a counter-weight to the communist nation. "We anticipate that the relationship with India will continue to be strengthened. With respect to China, it's not completely clear which way they are going because you have...