The White House is keeping close tabs on who has read the text of the recently signed Iran nuclear deal, a document that has been marked as “unclassified,” yet is being kept in a highly secured location. Members of Congress and staffers with high-level security clearances are being forced by the White House to consent to top-secret security measures in order to view the deal text, which is off limits to the American public, according to a senior Senate aide familiar with the process. The White House has come under fire from Congress and others for refusing to publicly release...