I think I figured this bad boy out:
It's a NBC TV pilot, rarely broadcast, called Shadow of the Land (1968) (http://www.imdb.com/title/tt0063589/
"This film deals with the aftermath of the U.S. being placed under the control of the ISF, the "Internal Security Forces" in the wake of cleverly staged "terrorist" attacks. All it needs is a few more "terrorist" attacks, and the U.S. will be placed under control of a dictatorship , who will root out and destroy the terrorists. Freedom is already lost. All it needs is a few more actions to give total control by the ruling junta. The mission of the freedom fighters is to stop the attempted sabotage of a power plant by the agents of the government. Watch it and get chills."
"A fascist dictatorship takes over the country in an "election" when everyone is scared by events. No longer called the president, he is now "The Leader" (which is what Der Fuhrer means) and has taken emergency powers voted in by a panicked Congress (a la' The PATRIOT ACT) and has created a Gestapo called the Internal Security Force (Homeland Security). People can't pass from one part of the country to another without an internal passport, a la' the old Soviet Union (and the proposed national ID cards now). A small resistance called the Society of Man learns from a patriotic Air Force colonel that the INF is going to launch terrorist attacks to blame on the resistance to take even more control and erode public support for the Society of Man."