14th amendment defines citizenship and the 16th amendment oh. i think you should know the 16th amendment. federal income tax. okay. o donnell s gaffe is just one of the stories making news from the campaign trail this morning. let s check in with mark preston, cnn politics.com desk. makes you uncomfortable hearing that, mark. it does. you know, the problem for christine o donnell is she has portrayed herself as aex pert of the constitution and of course as a tea party candidate she talked about how the tea party would like to see how the constitution is interpreted. she s already down in the polls right now significantly to chris coons. this is just yet another stumble and here in washington, d.c., when you talk to republican strategists, kyra, they re just fris traited by her and some of the other candidates out there heading into election day that are making gaffes like this because literally they see the eye on th prize if they talk about the economy and talk about