Secretary of State Marco Rubio said on Thursday he had "zero doubt" that China has a contingency plan to shut down the Panama Canal in the event of a conflict with the U.S. and that Washington intends to address what it sees as a national security threat.

Panama President José Raúl Mulino has a message for Secretary of State Marco Rubio ahead of his impending diplomatic visit: The Panama Canal is not up for discussion. “It’s impossible,” Munilo said in Spanish at a press conference in Panama City on Thursday.

Secretary of State Marco Rubio states Trump's interest in Greenland and the Panama Canal is driven by national security concerns regarding China.

A key focus of Secretary of State Marco Rubio’s visit to Central America this week — his first trip as America’s top diplomat — will be to counter China’s growing influence in the region, the State Department’s top spokesperson said this week,

Panama's President José Raúl Mulino confirms discussions about US control of the Panama Canal are non-negotiable. He hopes US Secretary of State Marco Rubio's visit will focus on cooperation concerning migration and anti-drug trafficking efforts.

Panama President José Raúl Mulino says there will be no negotiation with the United States over ownership of the Panama Canal.

Panamanian President Jose Raul Mulino ruled out discussing control of the Panama Canal with U.S. Secretary of State Marco Rubio when he visits the Central American country. "I cannot negotiate and much less open a process of negotiation on the Canal," Mulino said during his weekly press conference, saying the matter is "sealed."

By Simon Lewis and Matt Spetalnick WASHINGTON (Reuters) -When Marco Rubio arrives in Latin America this weekend on his first foreign trip as Donald Trump's secretary of state, he'll find a region reeling from the new administration's shock-and-awe approach to diplomacy.

Panama has owned and administered the Panama Canal for nearly three decades. President Trump wants to change that to counter growing Chinese influence in Latin America.

Sen. Ted Cruz (R-TX), the chairman of the Senate Commerce, Science, and Transportation Committee, discussed a scenario in which China could disrupt U.S. trade by blocking off the canal.