president trump s tariffs on steel and aluminum imports are reality. a 25% tariff on steel and 10% on foreign aluminum. canada and mexico are exempt for now. the move is the rattling u.s. allies and laying bare fault lines within the gop. the president framed the decision as keeping a campaign promise and he railed against the trade practices he blames for decline of american manufacturing. > the american steel aluminum industry has been ravaged by aggressive foreign trade practices. it s really an assault on our country. it s been an assault. the president is using an an obscure national security provisionings to could the tariffs. to exclue canada and mexico coundercut that rationale. other countries can apply for exemptions but the flexibility didn t satisfy paul ryan. arizona senator jeff flake is