As President Donald Trump and other U.S. officials promise 25% tariffs on Canada and Mexico starting as soon as Saturday, analysts are assessing whether the levies actually will hit, when they might come into force and how big their effects could be.

President Donald Trump will move forward with new tariffs on Canada, Mexico and China on Saturday, the White House said, affirming he would stick to his February 1 deadline for the new duties that could have widespread effects on the economy.