WASHINGTON - Senate Majority Leader Bill Frist, under federal investigation for possible insider trading, will have a nice nest egg to fall back on when he retires from Congress in January, recording income last year of more than $5 million from his largest blind trust. Frist, R-Tenn., is hardly the richest member of the millionaires' club of Congress, but he and numerous other lawmakers whose financial dealings have been questioned were under scrutiny as House and Senate lawmakers disclosed their finances Wednesday. Rep. Alan Mollohan (news, bio, voting record), D-W.Va., steered millions in federal money to nonprofit groups in his...