appreciate it. >> good evening. >> susie: we have been speaking with david garrity of gva research. you can find more apple analysis on our web site, nbc.com. >> tom: republican presidential hopeful mitt romney released his tax returns today, adding fuel to the debate over the fairness and economic impact of the tax code. romney immediately went on the offensive, charging president obama's policies on taxes and the economy would lead to more debt, decline and disappointment. for his part, president obama will argue in tonight's state of the union address the tax system is stacked against middle class americans. and to make his poin mr. obama is bringing along a special guest. darren gersh reports. >> reporter: debbie bosanek is about to become berkshire hathaway's second-most famous employee. the reason? she is the new face of the "buffett rule," which holds a billionaire like warren buffett should not pay a lower tax rate than his secretary, debbie bosanek. to drive the point home, bosanek will be sitting in a place of honor with the first lady at tonight's state of the union speec