The Obama campaign has created an interesting website — http://romneyplan.org — which allows you to type in your income and see what would happy to your taxes under Obama’s and Romney’s tax plans. Of course, the website makes lots of assumptions, but the basic point is still true. Obama has already cut taxes for the poor and middle class, and contrary to what many people believe, their taxes have gone down under Obama. While under Romney’s tax plan, unless you are rich your taxes would go up.
There is also more accurate (and slightly more complicated) tax calculators created by the Citizen’s for Tax Justice.