A man Donald Trump introduced as retired Lt. Col. Louis Dorfman presented the Republican presidential nominee with his Purple Heart before a rally Tuesday in Virginia. “I said to him, ‘Is that like the real one, or is that a copy?” Mr. Trump recalled in his speech at a high school in Ashburn. He said the veteran assured him that the medal was real, saying, “I have such confidence in you.” “Man, that’s like big stuff,” Mr. Trump said. “I always wanted to get the Purple Heart — this was much easier. But I’ll tell you, it was such an...