President Trump has doubled the rate on foreign metals to 50%, saying the levies weren’t high enough to help the U.S. industry.

President Trump doubled almost all aluminum and steel import tariffs, seeking to curb China’s growing dominance in global trade. These six charts show the tariffs’ potential economic effects.

The latest escalation of Trump’s trade war will disproportionately hit Canada, which is the largest supplier of both steel and aluminum to the U.S.