A pollster for Donald Trump’s campaign received an on-air check Friday when he tried to brush off the former president’s racial attacks at an event for Black journalists. John McLaughlin faced off against CNN anchor Dana Bash as she grilled Trump’s in-house data-cruncher on the contrast between Republicans’ inclusivity messaging and remarks at the National Association of Black Journalists broadly condemned as racist. “The former president talks about it very openly how much he is trying to court black voters, particularly black men,” said Bash. “Does your data show that this [Trump’s messaging…