Much of the left promotes “power to the people”, including Cynthia McKinney who has made that phrase the name of her committee to evaluate a candidacy for president of the US in 2008 on the Green Party ticket.
Power TO the people implies that power is being given to the people from an entity higher up on the food chain.
In contrast, power OF the people is about taking the power, both actual and latent, in the people and using that to form a new political reality.
Right now the left is still stuck with celebrities. Ralph Nader, Dennis Kucinich, Cynthia McKinney. This will be the case until “to” becomes “of”.