Hunter Biden, son of former Vice President Joseph R. Biden, dismissed threats by the Trump administration to investigate his business dealings in Ukraine in an interview published Monday. Mr. Biden told The New Yorker that the first time he heard of the potential probe, a helicopter happened to be flying overhead. “I said, ‘I hope they’re taking pictures of us right now. I hope it’s a live feed of the President so he can see just how much I care about the tweets,’” he said adding he told his wife, “I don’t care. F*** you, Mr. President. Here I am,...