prevagen has been shown in clinical trials to improve short-term memory. prevagen. healthier brain. better life. next tonight to the supreme court showdown. after the senate confirmation hearings of brett kavanaugh, a new allegation of sexual misconduct decades ago. republican leaders questioning the timing of the claim. here's terry moran. >> reporter: the controversy began 24 hours ago, with a cryptic statement from democratic senator dianne feinstein. she had received information about judge brett kavanaugh and had referred the matter to investigators. her fellow senators were stunned. >> i wouldn't make any judgement of it until i had more information. >> reporter: today, "the new yorker" magazine reported what that information was. that back in july feinstein had received a letter accusing kavanaugh of sexual assault. the accuser reportedly claims that more than 30 years ago, when kavanaugh and she were high school students in maryland, he