Nine presidential candidates appeared this weekend at the annual gathering of conservatives. But Donald Trump, who got himself disinvited, was the one driving the conversation.ATLANTA — It was the Donald Trump show that wasn’t. The RedState Gathering, a high-profile annual convention of conservatives held here in Atlanta this weekend, drew nine presidential candidates. But the one driving the conversation was the one who wasn’t there. Trump, who had been slated to speak at the event on Saturday evening, was uninvited by RedState head Erick Erickson on Friday evening, following crude comments Trump made about Fox News anchor Megyn Kelly after...