WASHINGTON—A handful of Republican senators broke with President Trump on trade policy, joining with Democrats to pass a resolution aiming to undo the president’s 25% tariff on Canadian imports.The 51-48 vote to approve the measure took place just hours after Trump imposed a 10% baseline tariff on all imports to the U.

The Senate was expected to vote on a resolution that offers Republicans an off-ramp to the import taxes on Canada.

Sen. Mitch McConnell (R-Ky.) said the United States needs to “reinforce our allies” when asked why he voted to undo President Trump’s tariffs against Canada. Four GOP senators, including