The investigative arm of Congress is meeting opposition from some executive branch agencies, like the State, Justice and Defense Departments. Jordy Yager provides an interesting glimpse of the struggles facing the Government Accountability Office this morning: 
 
"There has always been friction between GAO and government agencies, but sources say the tension is intensifying and could lead to legal clashes between the legislative and executive branches. During the George W. Bush administration, then-GAO head David Walker sued to gain access to information from Vice President Dick Cheney’s energy task force. GAO lost its legal challenge. [Acting GAO head Gene] Dodaro says the Department of Justice (DoJ) has also limited GAO’s access, “resulting in delays and occasional denials of GAO access to information.”"
 
 
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