By Jonathan Stempel NEW YORK (Reuters) – A lawyer for Donald Trump said on Monday a possible conflict of interest involving the judge who oversaw E. Jean Carroll’s recent defamation trial may justify overturning the writer’s $83.3 million award. In a letter filed in federal court in Manhattan, the lawyer Alina Habba cited a Jan. 27 New York Post article discussing U.S. District Judge Lewis Kaplan’s alleged prior working relationship with Carroll’s lawyer Roberta Kaplan, who is not related. Both worked about two years at the same time at the law firm Paul, Weiss, Rifkind, Wharton & Garrison in …