Experts believe Trump would struggle to replace tax revenue with income from tariffs, as the president has recently suggested.

Upon returning to office, U.S. President Donald Trump has launched numerous tariff threats. They range from broad ones - a universal tariff on foreign-imported goods - to ones aimed at specific sectors,

Trump has threatened still more tariffs, proposing 25% on goods from Mexico and Canada, an additional 10% on China and 25% on Colombia after that country initially refused deportation flights from the U.

The man U.S. President Donald Trump has chosen to oversee his tariff agenda says hitting Canada with 25 per cent across-the-board duties would be an emergency measure to achieve border security — and could be followed by more tariffs in the future.