Donald Trump’s lawyers are trying to prevent an expert witness from testifying in his upcoming defamation trial against writer E. Jean Carroll. In a fun twist, the expert witness is the same woman who helped set massive damages for Rudy Giuliani.A federal judge ruled in September that Trump is liable for defaming Carroll in 2019 and owes her monetary damages. The exact amount will be set during the trial, which will begin in January.Trump’s lawyers filed a motion on Wednesday asking presiding Ju