PHOENIX (AP) — Donald Trump suggested Sunday that his new administration could try to regain control of the Panama Canal that the United States “foolishly” ceded to its Central American ally, contending that shippers are charged “ridiculous” fees to pass through the vital transportation channel linking the Atlantic and Pacific Oceans.

It is not clear how Trump would seek to regain control over the canal, and he would have no recourse under international law if he decided to make a play for the passage.

U.S. president-elect Donald Trump threatened on Sunday to reassert U.S. control over the Panama Canal, accusing Panama of charging excessive rates to use the Central American passage. The comments drew a sharp rebuke from Panamanian President José Raúl Mulino.