President José Mulino said Panama's sovereignty over the world's second busiest waterway is not up for discussion.

Tensions Rise Over Control of Panama Canal The United States has issued a strong warning to Panama regarding China’s influence over the Panama Canal. During a high-level visit to Panama City on Sunday,

US Secretary of State Marco Rubio has demanded that Panama make "immediate changes" to what he calls the "influence and control" of China over the Panama Canal. America's top diplomat said Panama must act or the US would take necessary measures to protect its rights under a treaty between the two countries.