"As the treasurer of 23 political committees, groups that raise funds to elect or defeat politicians, Oldaker has signed off on more than $2 million in donations since 1998 to the parties and candidates he is paid to influence," the group's report stated.
During his last presidential campaign, Biden paid Oldaker, Biden & Belair $133,377 for legal services, according to the FEC. His Senate campaign also paid the firm $9,104 for legal and accounting fees since late 2007. Earlier expenditures are not available electronically.
Delaware election law allows Biden to run for his seventh Senate term while running for vice president.
Hunter Biden has not received financial benefit from the firm's representation of his father, according to Wade. Hunter Biden had represented Oldaker, Biden & Belair and the lobbying firm on Capitol Hill, but severed ties with the National Group in 2006 before passage of a Senate ethics bill requiring senators to certify they or their family members would not benefit from directed spending items or tax benefits they are seeking, according to his father's Senate office.
Last month, Hunter wrote that he no longer expected to act as a federal lobbyist in a letter to the clerk of the House and Senate Office of Public Records that became public on Friday.