This pretty much 'splains it.

But who even knew about Fast and Furious? By that I mean, the mainstream media didn't responsibly cover this scandal. 

Most would not even acknowledge the existence of the scandal. Reportedly, NBC Nightly News ran its first story on the scandal just this past Tuesday.

We know from Fox and a handful of reporters,  the search for the truth has been going on for more than 16 months. 

Yesterday, Obama's press toadie, Carney, spinned it as a political witchhunt by the Right. 

With the Executive Privilege, Obama owns it now. 

Why would the pres invoke executive privilege?

Seriously?

For the same reason every pres has done it since Washington in 1791...

I actually think Cheney summed it up best

"clear that the president's authority to receive opinions from executive officers is not subject to interference from or control by other branches"

U.S. Border Patrol Agent Brian Terry was shot and killed in December, 2010. Ever since, the Terry family and Americans across the nation have asked how this could have happened. They want answers. 

AG Eric Holder has done nothing but stonewall Congress in its attempts to find these answers. Obama, you know the guy who promised transparency,  joined this stonewalling effort by asserting executive privilege over many of the documents about the operation that Congress had subpoenaed but still had not received.

Executive privilege is legitimate when properly invoked. But even then, the Supreme Court has maintained that it is not absolute. The Department of Justice (DOJ) must provide a compelling rationale for each assertion. Shielding wrongdoing has never been a qualifying rationale.

Heritage legal expert and former Department of Justice counsel Todd Gaziano explains:

First, the Supreme Court in United States v. Nixon (1974) held that executive privilege cannot be invoked at all if the purpose is to shield wrongdoing. The courts held that [President] Nixon's purported invocation of executive privilege was illegitimate, in part, for that reason. There is reason to suspect that this might be the case in the Fast and Furious cover-up and stonewalling effort. Congress needs to get to the bottom of that question to prevent an illegal invocation of executive privilege and further abuses of power. That will require an index of the withheld documents and an explanation of why each of them is covered by executive privilege—and more.

It is now up to Congress to ascertain the specific reasoning for executive privilege with every withheld document. Even in the unlikely case it is determined that this was a proper invocation of executive privilege, the administration is still not off the hook to inform Congress of what they know.