Sen. Lindsey Graham said President Trump is ready to release a trove of documents related to the Russia probe – but the South Carolina Republican recommended caution. “Yeah, I think he’s ready to declassify everything, but you know, we want to make sure we don’t reveal sources and methods,” Graham said Tuesday. For months, the president has been thinking about declassifying documents, such as FISA warrant applications. In November, Trump told The Post he was waiting for an opportunistic time to drop them. “I think that would help my campaign. If they want to play tough, I will do it....