just how good and generous they are. that's what they're hiding in the tax returns. >> let's look at the super pac priorities usa has an ad now about romney and the defenses on tax returns. >> the fascinations with taxes i paid i find to be small minded. i never paid less than 13% . >> but under ryan's plan, he would pay 1%. that's right, while middle class families would pay $1,000 more. romney and ryan, if they win, the middle class loses. priorities is responsible for the content of this advertising. >> the new nbc news/wall street journal poll asked voters how romney's tax returns on the federal income tax rate that he pays makes themes feel. 6% say they feel more positive about him because he pays such tiny taxes. 36% say they feel more negative about him.