The U.S. cities most vulnerable to a trade war with Canada turn out to largely be in the states that helped return Donald Trump to the White House — a sign of the possible political risk he’s taking with his tariff plans. A new analysis released Thursday by the Canadian Chamber of Commerce detailed the areas most dependent on exports to Canada, with San Antonio and Detroit topping the list of 41 U.S. metro areas.

<p>The U.S. cities most vulnerable to a trade war with Canada turn out to largely be in the states that helped return Donald Trump to the White House &mdash; a sign of the possible political risk he&rsquo;s taking with his tariff plans.&nbsp;A new analysis released Thursday by the Canadian Chamber of Commerce detailed the areas most dependent on exports to Canada, with San Antonio and Detroit topping the list of 41 U.S. metro areas.</p>