The director and a star of “My Cousin Vinny” responded to Donald Trump’s personal lawyer, Rudy Giuliani, quoting the film at a recent press conference. On Thursday, Giuliani partially re-enacted a scene from the film that he called one of his favorite law movies, in which a woman’s eyesight is challenged in court, to illustrate a point about representatives allegedly not being allowed to look closely enough to observe the ballot counting in Pennsylvania.