On his Tuesday radio show, conservative talker Mark Levin, author of “Ameritopia: The Unmaking of America,” reacted to former Pennsylvania Sen. Rick Santorum effectively ending his campaign with an announcement in Gettysburg, Pa., calling for his listeners to be “realists.” Levin had been an outspoken critic of Mitt Romney, but conceded that Romney’s likely nomination was a win for the so-called Republican establishment. “Well the Republican establishment got its way,” Levin said. “The Republican establishment has won yet again. Some of you are very upset about it. Some of you are self-delusional — not many. Some of you are thinking,...