Analysis-Why the US is claiming China’s presence violates the Panama neutrality treaty

By Marianna Parraga and Elida Moreno (Reuters) -Some U.S. lawmakers and officials are touting a nearly half-century-old treaty between the United States and Panama to justify the Trump administration's threat to reclaim the Panama Canal - provided it can show the strategic waterway's operation is under threat. Others, however, say hurdles would loom for any bid to use the 1977 Panama Canal