Questions focus on whether State officials improperly sent classified material. Even as Hillary Clinton tries to put questions about her private email server behind her, the FBI has stepped up inquiries into the security of the former Secretary of State's home-made email system, and how aides communicated over email, POLITICO has learned. The FBI’s recent moves suggest that its inquiry could have evolved from the preliminary fact-finding stage that the agency launches when it receives a credible referral, according to former FBI and DOJ officials inteviewed by POLITICO. Story Continued Below “This sounds to me like it’s more than a...