Experts said Michigan's agricultural and energy sectors would suffer too, resulting in higher prices for groceries and home heating.

Automakers and parts suppliers would struggle if President-elect Donald J. Trump followed through on his threat to impose 25 percent tariffs on imports from Canada and Mexico.

With a Monday evening promise on Truth Social that his incoming administration will slap 25 percent tariffs on all goods from Canada and Mexico — as well as increasing already existing tariffs on China — Trump sent reporters (and investors,