The White House claimed victory in a showdown with Colombia over accepting flights of deported migrants from the U.S. on Sunday, hours after President Donald Trump threatened steep tariffs on imports and other sanctions on the longtime U.

Both leaders defended their actions in a series of social media posts, further straining relations between the two nations.

The dollar firmed on Monday as traders pondered the ramifications of U.S. President Donald Trump's tariff plans at the start of a week where the Federal Reserve is widely expected to hold interest rates steady.