Trump's 50% tariffs on imported steel, aluminum take effect
1. Tariffs on imported steel and aluminum rise to 50% from 25%. 2. Canada and Mexico face significant impact from these tariff increases. 3. Aluminum prices have doubled amid heightened tariff environment. 4. Trading partners must submit proposals to avoid tariffs next month. 5. Current U.S. economic growth is forecasted to decline sharply due to tariffs.