From a CNN article:
The Buffett Rule, simply stated, requires the wealthiest Americans to pay taxes at rates not less than rates paid by middle-income Americans. Current loopholes that allow millionaires and billionaires to have unfairly low tax rates would be closed. It's only fair.
If you agree, please sign this petition.
It would be even better if you also contact your congressional representatives and urge them to vote for the Buffett Rule.