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RNC hits Obama on gas taxes

From NBC's Mark Murray
The gas-tax debate continues -- this time with a new Republican National Committee Web ad blasting Obama for not supporting a gas-tax holiday, while also noting that he supported a state one while in the Illinois legislature.

But it's worth pointing out that Obama -- while voting for that gas-tax holiday in Illinois -- later voted AGAINST a state measure extending it. As PolitiFact put it, "[I]t's not fair to call it a flip-flop when the very reason Obama opposes a suspension of the gas tax now is because he concluded that it didn't work when he supported one in the past."