Who's to blame for high oil prices.?

The democrats are saying that the Republicans & GWB are responsible for high oil price. If GWB has control over oil prices why didn't his dad have control over them when he was in office & oil was around $20. a barrell. His dad is much more involved in the oil business than he is. The people who are responsible for over 30% of the increase are the hedge fund managers & private equity fund managers who are financing B.O.'s campaign. The republicans want to regulate these derivatives they way other mutual funds are regulated. Ralph Nader wants to tax all derivatives instead of taxing wages. BO. hasn't said but the fact that these people are financing his campaign and will get his support against regulation or taxation tells where his interest lies. The rest of the increase in the oil price is due to increased demand in the developing nations. So who is really to blame?