A president with even the slightest bit of common sense would not have entered this conflict. President Donald Trump, who has argued that the US does not need Canada, lamented Monday that his northern neighbor did have something he wants: aluminum. Key points and original sources are listed below.

• A president with even the slightest bit of common sense would not have entered this conflict.S1

• President Donald Trump, who has argued that the US does not need Canada, lamented Monday that his northern neighbor did have something he wants: aluminum.S2