On the same day that state-level Republicans in Alaska worked to affirm their close relationship with Canada amid U.S. President Donald Trump's trade war and threats of annexation, an Alaskan senator warned British Columbia's premier that "you don't want to mess with Alaska."

Alaska Sen. Dan Sullivan of the Republican Party 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 …