Newly inaugurated U.S. President Donald Trump is pushing to "take back" the Panama Canal, the world's second busiest interoceanic waterway.

Secretary of State Marco Rubio embarks soon on his inaugural trip as the United States’ top diplomat. His first stop, Panama could prove to be the most contentious on the itinerary.

President Donald Trump cannot take the Panama Canal — at least not legally — as he would be violating every single treaty that the U.S. has come into with Panama since 1945, international law and national security experts told WLRN.