A liberal financier at the center of two congressional ethics controversies may also be involved in some questionable business dealings, according to the New York Times. S. Donald Sussman, a billionaire hedge-fund titan, made news after his fiancé, Rep. Chellie Pingree (D-ME), was accused of traveling on his private jet to campaign events.Rep. Barney Frank (D-MA) has also been scrutinized for traveling to Sussman's Virgin Islands mansion on the billionaire's plane. Republicans have said the trip had the appearance of impropriety, since Frank serves as chair of the House Finance Committee and a company owned by Sussman has...