EXCLUSIVEThe designation suggests the hackers successfully compromised swathes of sensitive data stored directly on FBI systems.The breach of a sensitive FBI surveillance system does not appear to be connected to a recent Iranian-linked compromise of FBI Director Kash Patel’s personal emails. | Francis Chung/POLITICO The FBI last week deemed a recent China-linked cyber intrusion into a sensitive agency surveillance system a “major incident,” meaning it poses significant risks to U.S. national se...