LIVE: Live updates: Trump’s long-threatened tariffs against Canada and Mexico go into effect

Other news we’re following today:

• Ukraine aid paused: Trump on Monday directed a “pause” to U.S. assistance to Ukraine as he seeks to pressure Ukrainian President Volodymyr Zelenskyy to engage in negotiations to end the war with Russia.
• McMahon confirmed: The Senate voted Monday to confirm former wrestling executive Linda McMahon as the nation’s education chief, a role that places her atop a department that President Donald Trump has vilified and vowed to dismantle.
• Trump’s joint address: Trump will stand before a joint session of Congress Tuesday evening to give an accounting of his turbulent first weeks in office as a divided nation struggles to keep pace, with some Americans fearing for the country’s future while others are cheering him on.