Dealing with the unprecedented threats from Donald Trump's threats to Canada's economy and sovereignty have required unconventional strategies from federal and provincial leaders, including barring liquor sales and cancelling contracts with Tesla. But among the more unorthodox strategies to hit back against the US is spending hundreds of thousands of dollars on novelty hats. In January, sensing a marketing opportunity after Trump threatened to annex Canada, an Ottawa-based company began selling hats with the message Canada is not for sale in capital letters.