Obama's camp digging up dirt on NJ governor Chris Christie in case he decides to run for president: sources - NYPOST.com

President Obama's re-election campaign is trying to dig up dirt in the Garden State.

Despite New Jersey Gov. Chris Christie's repeated pronouncements that he will not seek the GOP presidential nomination, Obama operatives are compiling a dossier of what they call 'opposition research' -- material that could be used to damage Christie if he changes his mind, The Post has learned."