More than 100 years after the construction of the engineering marvel that linked the Atlantic and Pacific oceans — and 25 years after the canal was returned to Panama by the US — the Panama Canal faces renewed intimidation from US President Donald Trump.

U.S. investment bank JPMorgan has downgraded its recommendation on Panama's bonds after U.S. President Donald Trump ramped up his threat this week to take back the Panama canal.

They say they fought too hard to wrest it from the U.S. to now hand back the waterway, which is part of the nation’s identity.