An altercation over a man’s refusal to remove a “Make America Great Again” hat triggered a recent active shooter scare at a Pennsylvania mall, police said. The altercation started outside when a man confronted another man wearing the hat in support of President Donald Trump outside the Wyoming Valley Mall in Wilkes-Barre on Dec. 30, authorities said Tuesday. The man threatened to assault the Trump supporter if he did not remove his hat, and then tried to knock it off his head. Police say the man wearing the hat then pulled a gun out and pointed it at the ground,...