Ask the NSA first
FBI wants to solve crimes. NSA is responsibile for national security. In that role, the NSA doesn't give a hoot about your privacy, but they are very, very interested in keeping the data of politicians, military, police, industry etc. safe, everything that would be in the interest of national security.
The NSA has repeatedly said that giving the police such access will be damaging to national security.
Biting the hand that feeds IT
