The poll, which appears to have been conducted more than a month ago, might provide the best numbers that Trump has to tout. His support has dipped sharply in recent weeks, with some polls showing him trailing Clinton by as much as a double-digit margin. RealClearPolitics' polling average finds him 5.8 percentage points behind the presumptive Democratic nominee in a head-to-head matchup, a big shift from the statistical dead heat polls found them in when this particular survey was conducted.