If Tr*mp thought that replacing the late Lindsey Graham with his inexperienced sister was a good idea, he’s quickly rethinking it. Last night’s races in Georgia and Florida left Tr*mp-endorsed candidates wearing a blazing “rejected” stamp on their foreheads, and it’s not looking good for the ever-sloppier MAGA agenda. Last night in South Carolina, Darline Graham was lustily booed during a televised appearance that left her fully humbled. To be f…