US President Barack Obama's administration is scrambling to quell concerns ahead of a Congressional review of the impending Iran nuclear deal that is approaching a June 30 deadline, but one US Senator reports Obama is refusing to reveal a document detailing the full scope of the deal. Senator Bob Corker (R-TN), who is chairman of the Senate Foreign Relations Committee, said that he and other Senators are trying to obtain a document with the exact details of what the administration has already agreed to - but their requests are being refused. "There is a document that explains what Iran is...