What to know about Trump's 50% tariffs on Canadian goods that just went into effect

WASHINGTON (AP) — The United States and Canada, historic allies along an undefended border, fell deeper into a trade war Saturday marked by angry recriminations and new tariffs that are expected to raise prices for products in both countries. Each side blamed the other for the collapse of negotiations in Washington late Friday, leading the U.S. After trade negotiations crumbled at the eleventh hour, President Donald Trump's 50% tariffs on scores of Canadian imports kicked in on Saturday.