New: The same elite Chinese hackers that broke into AT&T and Verizon to spy on government leaders' calls also severely compromised the National Guard in at least one state for most of last year, and potentially could have used that access to pivot to other states, Guard networks, fusion centers.

National Guard hacked by Chinese ‘Salt Typhoon’ campaign for nearly a year, DHS memo says
A memo seen by NBC News says that Chinese hackers compromised at least one state’s National Guard for over nine months.