If there is no law why the fear of being prosecuted?
NOBODY was ever charged with “outing” Valarie Plame as a CIA agent. That charge would have been impossible to prove, since political hack Plame’s blowhard husband, Wilson, had already bragged to the whole world about his wife's CIA status, since Plame parked her vehicle in an open CIA parking lot for several years, and since the woman who WROTE the law in question said Plame was not covered.
Prosecution is punishment in and of itself. Even if found innocent, the cost of being prosecuted by the Federal Government is huge.
Libby was prosecuted for conflicting statements about dates and times.
Even with the help of cell phone records and a calendar, I can not tell you everyone I talked to at this time last year. That is, basically, what happened to Libby.
Also, a TRIAL will give our mortal enemies even more intelligence information about our methods.
That would be STUPID!
But a traitor like Obama does not care about the destruction of the United States.