The administration has imposed new tariffs of 10-12.5% on imports from the UK, Mexico, Canada, Australia, India, China, and the 27 EU states under Section 301 of the Trade Act of 1974, replacing an expiring 10% global duty. Jamieson Greer announced the measures following a Supreme Court ruling that limited prior emergency-power tariffs. Coverage comes exclusively from left-center sources, with disputes over the exact number of countries affected.