Note the date on this is fully thirty years ago, at which time he felt that the first stage -- demoralization -- was complete. Consider how far we've come since then in running down America, its Founders and its Constitution, as an aspirational ideal.
This was the official plan of the KGB, and one that they used effectively in Latin America during the 1970s and 1980s. (Also in Asia.) Why didn't it work here? Possibly because the Soviet Union collapsed, and so the professionals behind the program weren't there to leverage and guide the moment of crisis when it finally came. The Marxist-influenced intellectuals actually became in charge, rather than being shot against the wall and replaced with professionals.
But also possibly because the crisis was never great enough to overcome the American capacity for force. You couldn't roll tanks into America like you did in Czechoslovakia, and the country was always too big, too spread out, and too well armed to rule with a secret police. We can't even manage to get people to stop selling each other drugs, let alone effect totalitarianism.
In any case, this was the plan, and it failed. We still have to deal with the effects of the demoralization, however. It remains a huge problem for our country that the young have -- for what is now four generations -- been half-educated to despise its ideals and their own history. Recovering a natural patriotism and a proper admiration for the ideals of human liberty remains a major part of the work to be done.
There's a much longer interview with the same man here, for those who want to learn more.