Agriculture Secretary Brooke Rollins acknowledged American farmers' concerns over the escalating trade war with Canada Tuesday but insisted the United States will come out on top.

President Donald Trump's trade war with Canada is escalating as the midterm elections approach, threatening Republican efforts to address voters' economic concerns in a year when control of the U.S. Senate hinges on states along the border between the United States and its northern neighbor.

Canada will announce retaliatory tariffs against the United States on Tuesday, an official familiar with the plans told The Associated Press, escalating a trade fight that has sharply worsened since negotiations with the Trump administration collapsed.