But the shift toward more protectionism in the Americas — a reversal from decades of globalization and close cross-border ties in the region — may not convince Trump to budge. While some countries have won tariff cuts and exemptions for certain goods, the US president has cast duties on steel as key to protecting national security and boosting domestic production of the alloy. His trade policies are bolstering the steel industry in the US while pummeling producers abroad, reshaping supply chains as companie ...