WASHINGTON — U.S. Rep. David Scott has used his campaign account to pay more than $500,000 to four family members and his family's business, according to an investigation by The Atlanta Journal-Constitution. The Atlanta Democrat, who graduated from the prestigious Wharton School of Business, also had had more than 40 tax liens — some dating to the 1980s and 1990s — placed against his home and business, the Atlanta-based Dayn-Mark Advertising.