I believe legislatures are working on this on the state level. Some states are taking the lead. They are slowly passing laws which further protect gun rights, and doing things which the Federal Government generally disagree. Such as Michigan and others passing laws which allow for concealed carry in schools by teachers, and other faculty and staff.
Several states took action after the gun confiscation which took place after Katrina. Missouri was one of them which passed a bill which would prevent gun confiscation during periods of "declared emergencies."
I think we are a long way away from an armed response by a "citizen militia." Many states are slowly working on these issues.
We must continue to be active in our state government. Our state government is our first line of defense, and our strongest defense. We must continue to elect Governors and state legislatures which will fight to protect the US Constitution, and ensure our State Constitutions are strong and with purpose.