republicans will lose the seat because she has said "nutty things." >> if he worked as hard for me as he is against me, then i have no doubt we can win. >> reporter: critics claim she's taken extreme positions on social and moral issues, advocating abstinence and saying that viewing pornography was like cheating on your spouse. >> that was a long time ago, i'm in my 40s now. i've matured in a lot of my positions. and a lot of the way i present my beliefs. i am a practicing catholic. >> reporter: democratic officials labeled her ultra right wing. too conservative for delaware. but vice president joe biden told msnbc's rachel madow democrats should not be overconfident about winning his old seat. >> i think in my state, this new republican candidate is going to have an awful lot of money. i think you're going to see it pouring in. >> reporter: analysts say delaware republican leaders were so focused on calculating a general election win, they misjudged the anger channeled by o'donnell.