Citizen militias will not cut it. In the American Revolutino it worked because there was no American military. And the citizen militias then became the regular American military. National Guard alone cannot do it.
With the humongous behemoth we are now facing, it will require the entire might of the US government to fix, one way or the other.
The signs of civilization decay and collapse are obvious all over the place. If the Republic cannot be restored, it will fall another way, but it will be horrible, and outside interests (modern day Goths and Visigoths/whatever) will take the remnants.
OK; you are on record as opposing the Constitutional principle of Posse Comitatus.