Saul Alinsky was the Marxist whose doctrine has been learnt and followed by both Hillary Clinton and Barack Obama.

Melanie Phillips has an excellent column about him and them in The Spectator.   

The seditious role of the community organiser was developed by an extreme left intellectual called Saul Alinsky. He was a radical Chicago activist who, by the time he died in 1972, had had a profound influence on the highest levels of the Democratic party. Alinsky was a ‘transformational Marxist’ in the mould of Antonio Gramsci, who promoted the strategy of a ‘long march through the institutions’ by capturing the culture and turning it inside out as the most effective means of overturning western society. In similar vein, Alinsky condemned the New Left for alienating the general public by its demonstrations and outlandish appearance. The revolution had to be carried out through stealth and deception. Its proponents had to cultivate an image of centrism and pragmatism. A master of infiltration, Alinsky wooed Chicago mobsters and Wall Street financiers alike. And successive Democratic politicians fell under his spell.

His creed was set out in his book ‘Rules for Radicals’ – a book he dedicated to Lucifer, whom he called the ‘first radical’. It was Alinsky for whom ‘change’ was his mantra. And by ‘change’, he meant a Marxist revolution achieved by slow, incremental, Machiavellian means which turned society inside out. This had to be done through systematic deception, winning the trust of the naively idealistic middle class by using the language of morality to conceal an agenda designed to destroy it. And the way to do this, he said, was through ‘people’s organisations’.  

The whole thing is a must-read.