Mexico, Canada and the European Union on Tuesday condemned U.S. President Donald Trump's decision to impose tariffs on all steel and aluminum imports next month, a move that has fanned fears of a trade war as business and political leaders braced for yet more trade duty announcements from the new administration.

President Donald Trump's tariffs on steel imports this week could wreak havoc on American auto manufacturing, industry leaders say. The moves align with the Trump administration's aggressive global trade agenda and ambitions to strengthen U.