I still think that the worst that might happen to him is that he will have to resign. No one has the guts to go after a prominent black figure--and if they did, Obama can give him a pardon. In fact, the possibility of a pardon would be the carrot Obama can use to ensure that Holder won't spill the beans on Obama himself.
The Obama administration was in campaign mode all the time. They were determined to stop any leaks that might hurt them politically--while outrageously leaking information that made Obama look good even if it hurt national security.
Their pursuit of Rosen probably had less to do with the supposed North Korean story than with getting information about his contacts that might be helpful to them politically or to aid in their war against Fox News.
So how do we deal with these bastards?
It's all about building "lists":
Facts Are Stubborn Things (send "fishy" emails to White House)
How the Obama Campaign's Data-Miners Knew What You Watched On TV
Obama campaigns chief data guy gets candid about the data strategy that won the election