President Obama was quick to seize on a Brookings/Tax Policy Center study that came out yesterday arguing that Mitt Romney’s tax plan would increase taxes on the middle class. What the study did was examine which tax deductions would have to be cut or eliminated to reduce marginal tax rates as proposed by Romney, while collecting the same amount of revenue as the current system.

But the study itself cautioned that there weren’t enough details in Romney’s plan to make a hard estimate.

The first paragraph of the study notes:

(We do not score Governor Romney’s plan directly, as certain components of his plan are not specified in sufficient detail, nor do we make assumptions regarding what those components might be.)

Yet here’s what Obama said yesterday at a campaign stop in Mansfield, Ohio:

Just today, an independent, nonpartisan organization ran all the numbers on Governor Romney’s plan.