Some of Hillary Clinton's emails on her private server contained information so secret that senior lawmakers who oversee the State Department cannot read them without fulfilling additional security requirements, Fox News has learned. The emails in question, as Fox News first reported earlier this week, contained intelligence classified at a level beyond "top secret." Because of this designation, not all the lawmakers on key committees reviewing the case have high enough clearances. A source with knowledge of the intelligence review told Fox News that senior members of the Senate Foreign Relations Committee, despite having high-level clearances, are among those not...