(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.

China's presence around the Panama Canal is a national security concern that Panama's government has to deal with, Mauricio Claver-Carone, the U.S. special envoy for Latin America, said on Friday, ahead of U.

President Donald Trump's suggestion of the U.S. taking control of the Panama Canal has a legal basis partly due to potential treaty violations involving Chinese activities in Panama.