The Ontario premier, a conservative, said he supports Prime Minister Mark Carney's decision to impose retaliatory tariffs.
"We agree Canada needs to stand firm, strong and united," Ford posted on X. "I fully support the federal government preparing retaliatory tariffs to show that we’ll never back down."
Ford previously imposed a tax on energy imports to Michigan, Minnesota, and New York but lifted the tax after he met with Commerce Secretary Howard Lutnick.
On Friday, Trump said he had "an extremely productive call" with Carney.
"[W]e agree on many things and will be meeting immediately after Canada's upcoming election to work on elements of politics, business and all other factors that will end up being great for both the United States of America and Canada," Trump posted on Truth Social.