Our most-read: Canada and U.S. tangle, on paper and aluminum

Topping the charts: Canada, on defense, says aluminum exports help, not hurt, U.S. . “Far from being harmful” to the U.S. aluminum industry, Canadian Ambassador to the U.S. Kirsten Hillman said, “aluminum exports are indeed a great help and benefit.” She was pushing back against word that the Trump administration was considering imposing Section 232 (Trade Expansion Act of 1962) tariffs on Canadian and Mexican aluminum imports, which according to U.S. Trade Representative Robert Lighthizer have been surging. Hillman...