US President Donald Trump has slapped a new 12.5 per cent tariff on imports from Australia.

The United States will slap taxes of 10% to 12.5% on imports from 60 countries accounting for 99% of U.S. imports, charging that they have inadequately enforced bans on goods…

The Trump administration has ramped its tariff actions back up since the president's trade agenda suffered major legal setbacks earlier this year.