Former US congressman Jesse Jackson Jr, the son of the well-known civil rights leader, pleaded guilty Wednesday to misusing $750,000 in campaign funds, including by buying himself a gold Rolex watch. The admission capped a stunning fall from grace for the Illinois Democrat who was once a rising national star but resigned under a cloud in November after 17 years in the House of Representatives. Prosecutors said Jackson used some of the siphoned funds to buy children's furniture, fur capes and a $43,350 gold-plated Rolex watch.