First Daughter Jenna Bush has every reason to be fed up with the beating she’s taken on late-night TV. But confronting Craig Kilborn in a bar probably won’t help matters very much. A West Coast spy reports that the 19-year-old Bush was in a Los Angeles watering hole last week when she spotted Kilborn drinking with Vince Vaughn. Bush, who’s spending the summer in L.A. as an intern at entertainment firm Brillstein-Grey, introduced herself to Kilborn and then pleaded, “Will you stop making fun of me on the air?” Sure, Kilborn said. But then, without missing a beat, he cracked, “So, can I buy you a beer now?”