A Democratic strategist laughed Thursday night on CNN when asked if Donald Trump can stay on message before laying into media outlets that he said were duped into giving the MAGA leader free air time at his news conference Thursday. Keith Boykin told panelists on “NewsNight” that Trump didn’t hold a news conference — he held a campaign rally speech at his Bedminster, New Jersey, golf club — even bringing MAGA supporters. “He fooled the press again — once again — by claiming he was going to have a press conference. He spoke for 45 minutes before he even allowed a question to be asked. And when …