Pardons are granted after someone has been found guilty. So far, Snowden has only been charged of treason and since he's not coming to the US to stand trial, a pardon is not applicable.
"Dropping the charges" would be more accurate.
"Dropping the charges" would be more accurate.
http://www.politico.com/story/2014/01/edward-snowden-clemenc...
His accepting the pardon would be an admission that he performed the actions in question, but he admits that anyway.