As state-level Republicans in Alaska work to affirm their close relationship with Canada amid U.S. President Donald Trump’s trade war and threats of annexation, an Alaskan senator has warned British Columbia’s premier that “you don’t want to mess with Alaska.”

Dan Sullivan of the Republican Party, who represents Alaska in the U.S. Senate, made the remarks in an interview with an Anchorage radio station posted to his Facebook page.

During the conversation, which touched on topics ranging from energy development to Ukraine, Sullivan, one of two senators who represent the state in Washington, was asked about B.C. introducing legislation that grants the province the ability to levy new fees on U.S. commercial trucks heading to Alaska.