President Donald Trump formally announced a 25% tariff on all steel imports today, reigniting concerns about a potential global trade war.
Trump imposed similar tariffs during his 2017-2021 presidency to protect US industries, which he believed faced unfair competition from Asian and European countries.
U.S. metal makers have been lobbying the Trump administration for protection against foreign competition.
The move came as Trump plans to unveil "reciprocal" tariffs on U.S. imports later this week to match tariff rates that other countries impose on U.S. exports in what would be a deepening of trade tensions between America and its trading partners.