Trump's Canada trade war threatens GOP Senate races in border states

President Donald Trump's escalating trade war with Canada threatens Republican efforts in Senate races along the northern border, as negotiations broke down and tariffs were raised on $20 billion in Canadian imports. Canada plans retaliatory tariffs Tuesday, potentially raising prices and disrupting supply chains. Republican Sen. Susan Collins of Maine, a top Democratic target, called the tariffs a mistake, citing impacts on lobsters, blueberries, and lumber. The dispute pressures Republicans in Michigan, Ohio, and Alaska, where Canada is a key trading partner, while Democrats seek to capitalize. Trump defended the tariffs, claiming Canada has "ripped off" the U.S., while Vice President JD Vance visited Maine to assure voters of fair treatment. Collins avoided appearing with Vance, campaigning separately against Democratic nominee Troy Jackson.