German MP visits Assange

[AntiFascist]

8. I'm sure AG Holder is well aware of ex post facto laws...

"close those gaps" could simply mean fresh interpretations of existing laws. Indeed, if you pay attention to the context of the article, Assange could be prosecuted under the Espionage Act because he was previously urged by the State Dept. not to release the cables (presumably because of harm that could be done to US national security), thus,

Under the Espionage Act, anyone who has "unauthorized possession to information relating to the national defense" and has reason to believe it could harm the United States may be prosecuted if he publishes it or "willfully" retains it when the government has demanded its return, Smith said.