"I would freeze interest rates for five years." -- Hillary Clinton, various times recently, including a few minutes ago in debate, on her mortgage crisis solution.
"Effective immediately, therefore, I am ordering a freeze on prices." -- Richard Nixon, June 13, 1973, announcing latest phase of his "new economic policy."
"I notice the tide is coming in. Do you think it will stop if I give the command?" -- King Canute, perhaps apocryphal, trying to inform worshipful subjects of the limits of his power.