President Bill Clinton 's triumphal appearance at the Democratic convention , a vital moment in his bid for a second term , was marred on Thursday by the resignation of a top adviser in a reported sex scandal .
<response> President <person>Bill Clinton</person> 's triumphal appearance at the <misc>Democratic</misc> convention , a vital moment in his bid for a second term , was marred on Thursday by the resignation of a top adviser in a reported sex scandal . </response>