Barack Obama.

For claiming that there were no oil spills from platforms and as a result of Hurricane Katrina:

I don’t agree with the notion that we shouldn’t do anything. It turns out, by the way, that oil rigs today generally don’t cause spills. They are technologically very advanced. Even during Katrina, the spills didn’t come from the oil rigs, they came from the refineries onshore.

The problem here, as the folks at Media Matters so ably note, this is false. Hundreds of thousands of gallons of oil and distillates were spilled offshore as a consequence of hurricane Katrina.

It’s not true, it’s never been true, and he’s a smart guy, and he knows this.