But unions already disclose the amount they spend , and its source -- members ' dues -- is a known quantity , she said . Democrat and Republican leaders are battling over disclosing big-dollar donors . The House Oversight Committee is investigating the matter. Voters are the ultimate losers in this fight over transparency , some politicos say .
Democrat and Republican leaders are battling over disclosing big-dollar donors . The House Oversight Committee is investigating the matter. Voters are the ultimate losers in this fight over transparency , some politicos say .