My mind is a bit scattered, rough morning...
I’m not sure I agree that Guerilla warfare or a “Maoist” war would be possible in Amerika, it probably would be unnecessary. The only means to revolution is a massive uprising of the proletariat, when the majority of the people want and desire change and are willing to fight for that change. If you look at other countries as an example when there is a massive uprising that is so large, the ruling elite have little power and the police/military are simply not effective in oppressing the uprising. When the police/military are ordered to fire upon crowds of people and some of those soldiers/officers have friends/family in those crowds, what are they going to do?
A perfect example is in France 1968 when exactly that occurred. After brutal police repression of student demonstrations, tens of millions of French workers went on strike and eventually took over entire cities/universities/factories etc. The entire country was paralyzed. Because the uprising was so massive, the military/police were infected by the revolution and most eventually sided with the people. Once the tools of oppression of the ruling elite are no longer willing to take orders, the ruling elite are powerless.
Of course, in order for revolution it’s essential that there is good leadership to lead the people. Without it the revolution will eventually wither and die, as in the case of France ’68. There were millions of people in the streets that occupied the cities and obviously wanted change, but the leadership was useless, IMO because they lacked a Marxist understanding and were mostly reformists not willing to completely overthrow the current corrupt government.
If you look at the Russian Revolution in 1917, only 40 people were killed. It was a hugely successful and a non-violent revolution and for the first time in the history, the proletariat overthrew the ruling class. The bloodshed was spilled during the COUNTER Revolution, where 21 or so Capitalist countries sent in troops to try and crush the revolution, which obviously ultimately failed. The difference between Russia 1917 and the US today is one was a backwards, 3rd world country while the other is arguably the most powerful nation in the world. If there were ever a revolution in Amerika, there would not be other nations that would send in troops. The ripple effect of Revolution in Amerika would spread across the world within weeks, if not days.
I think also we have to look at Guerrilla tactics and terrorists tactics that have already occurred in Amerika. During the late 60s and 70s when there really was a revolution sweeping not only Amerika, but the entire world there were a number of Maoists groups, one in particular The Weatherman Underground who bombed government and police facilities for years, about 11 in total. Dozens upon dozens of bombings which for the most part were very successful. The problem with their tactics is that it isolated them from the people. They were forced to live underground and constantly on alert to avoid the police. Members were wanted by the FBI. They had trouble getting their message out. They started out with the potential to be an influential mass party, but ended up being an isolated, insignificant terrorist group.
But as Stealth pointed out, civil war is a completely different story and possibly more likely.