Trump administration imposed tariffs on EU steel in March 2025
I don't know how old your linked article is, as it's behind a paywall, but according to different sources aluminum US tariffs on aluminum were already implemented or increased in June 2018.
Did China also impose tariffs on EU steel in the meantime? Or, why should chinese companies copy the american companies?
The EU Packaging Waste Regulation laws which demand higher recycling rates were enacted in 2025. So considering the 2018s tariffs, US companies had reasons to import aluminum scrap for 7 more years. The increases in available scrap and on tariffs in 2025 surely strengthened this though.
That doesn't negate the fact that he already introduced tariffs on aluminum in 2018.