WASHINGTON (AP) — Secretary of State Marco Rubio embarks this weekend on his first foreign trip in office, heading to Central America to press President Donald Trump's top priority — curbing illegal immigration — and bring the message that the U.S. wants to reclaim control over the Panama Canal despite intense resistance from regional leaders.

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.

Secretary of State Marco Rubio says President Donald Trump’s desire to acquire Greenland and retake control of the Panama Canal is driven by legitimate national security interests stemming from growing concerns about Chinese activity in the Arctic and in Latin America.