President Donald Trump says 25% tariffs on imports from Mexico and Canada will start Tuesday, sparking renewed fears of a North American trade war. He announced the coming tariffs at the White House on Monday. He says the tariffs are to force the two U.S. neighbors to step up their fight against fentanyl trafficking into the U.S. Trump provided a one-month delay in February as both countries promised concessions. But Trump said Monday that there was “no room left for Mexico or for Canada” to avoid the steep new tariffs. “If Trump is imposing tariffs, we are ready," said Canadian Foreign Minister Mélanie Joly. "We are ready with $155 billion worth of tariffs and we’re ready with the first tranche of tariffs, which is $30 billion.” Joly said Canada has a very strong border plan and explained that to Trump administration officials last week. She said the diplomatic efforts are continuing. She spoke after Trump made his comments Tuesday.