Trump says he won't back down on tariffs plan

WASHINGTON— President Donald Trump insisted Monday that he's "not backing down" on his plan to impose stiff tariffs on imported steel and aluminum despite anxious warnings from House Speaker Paul Ryan and other congressional Republicans of a possible trade war.The president said that North American neighbors Canada and Mexico would not get any relief from his plan to place the tariffs on the imports but suggested he might be willing to exempt the two longstanding allies if they agreed to b