If Trump can’t pony up enough cash in the $83.3 million award to columnist E. Jean Carroll that the court ruled he must pay even while awaiting appeal — it will prove he’s a pretend billionaire. It would also suggest the Don can’t possibly come close to covering the $370 million disgorgement in the New York civil fraud case, according to one of his biographers. “I think he and his lawyers will scream and yell that this is all unfair and it’s rigged, which is of no legal consequence,” said David Cay Johnston. “And then he’s going to have to make some very hard decisions.” Want more breaking pol…