Did you know that about 55,000 millionaires pay a lower effective tax rate than millions of middle-income Americans?

It's true. The White House has a new tool that will be sure to infuriate you by letting you see personally just how many millionaires pay a lower effective tax rate than you.

It's a striking reminder of why we need Congress to pass the Buffet Rule now. You can check out the online calculator for yourself here.

On Monday, April 16, the U.S. Senate will debate and vote on the "Buffett Rule," which guarantees that millionaires will no longer pay a lower share of taxes than working people.Tell your Senator now to join you in supporting tax fairness with a yes vote on the Buffett Rule.