The thought of 2 N. Korea satellites flying over us doesn’t bring much comfort....
It depends on their purpose and capability. Furthermore, we have the capability to neutralize their satellites.
Assuming they orbited two EMP nukes they could take out much of the power grid and any vehicle running at the time. There would be no damage to the military. People on life support would mostly die. We would fully recover in a few months.
I think, though, the world powers are banking on a coup.