Trump's latest tariff announcement is not set in stone, a White House official said, adding that the new duties could come later in the week.

Walking through a Michigan plant past whirring robotic arms and flying sparks, Swamy Kotagiri, the CEO of Canada-based auto supplier Magna reflected on how he is trying to "control the uncontrollable" in the midst of industry-shaking tariffs.

President Donald Trump on Tuesday called on the Senate to keep the United States' tariffs on Canada in place -- hours before Democrats in the upper chamber could potentially force a vote aimed at blocking the president from imposing tariffs on the ally country.