Republican senators are accusing President Obama of pushing a “less-than-honest” claim about the scarcity of domestic oil, after a U.S. Geological Survey study showed the United States might actually hold a quarter of the world’s untapped, undiscovered supply.

The president often uses a much different statistic in speeches.

He said Tuesday, as he has before, that “the problem is we use more than 20 percent of the world’s oil and we only have 2 percent of the world’s proven oil reserves.”

“Even if we drilled every square inch of this country right now, we’d still have to rely disproportionately on other countries for their oil,” Obama said, while pitching a plan to crack down on oil market speculators.