"Gunwalker" case heats up with Obama administration refusing to provide information

The Justice Department is refusing to provide information on the "Gunwalker" case

It started with one whistleblower, but now involves dozens of investigators, has created a standoff between the Department of Justice and lawmakers and threatens Mexico’s diplomatic relationship with the United States.
Friction is growing over the probe into the failed “Project Gunrunner” program -- run by the Justice Department's Bureau of Alcohol Tobacco and Firearms that intended to stop the flow of guns to criminals in Mexico. Whistleblowers claim the bureau actually encouraged the illegal sale of firearms to known criminals, then allowed those guns to be smuggled to Mexico and tracked.
On Tuesday, Rep. Darrell Issa (R-Calif.) went after Attorney General Eric Holder for refusing to answer questions and subpoenas for documents that implicate who approved the Bureau of Alcohol, Tobacco, Firearms and Explosives project that allowed guns purchased illegally in U.S. to be smuggled into Mexico on behalf of the drug cartels with the knowledge and consent of the ATF.
"We're not looking at straw buyers, Mr. Attorney General, we're looking at you," Issa said. "We're looking at you, we're looking at your key people who knew or should've known about this." . . .
Also on Tuesday, in a letter to the attorney general signed by both Issa and Sen.Charles Grassley (R-Iowa), the Congressmen say they are “disappointed that you do not appear to be taking this issue seriously enough”. Grassley, in a handwritten postscript, tells Holder he is being ‘ill-served’ by staff who are not telling him the whole story. . . .