Actress Jennifer Siebel is standing by her man, who happens to be Mayor Gavin Newsom, and says there's no trouble in their romance - Jennifer Siebel may be waiting for her big break in Hollywood, but in the hothouse world of San Francisco politics, she has already been cast -- as Mayor Gavin Newsom's leading lady. For the past six months, the actress, who has been linked in the past to Oscar winner George Clooney, has been shuttling back and forth between her West Hollywood digs and San Francisco, which she has been visiting with increased frequency to promote her...