A state trooper assigned to Gov. Andrew Cuomo’s security detail got hot and heavy with one of New York’s first daughters — and was soon transferred to a post near the Canadian border, The Post has learned. Trooper Dane Pfeiffer, 35, met Cara Kennedy-Cuomo, 25, through his job as one of her dad’s bodyguards, sources said. They began dating about seven months ago — after she moved into the Executive Mansion in Albany due to the coronavirus pandemic — and Cuomo learned about the relationship a short time later, sources said.