Canada is preparing to retaliate with an exhaustive list of tariffs on American goods if President-elect Trump follows through with his plans to add a steep 25% import tax on Canadian exports, people familiar with the matter told CNN.

The country’s leaders are trying to persuade the new administration to hold off while also seeking ways to inflict pain in a tariff spat.

Canada’s Ambassador to the U.S. affirmed that the country is willing to boost American imports in the wake of President-elect Trump’s threats to increase tariffs. “We are happy to source what we can from the United States.