O'Donnell wins Delaware GOP nomination

BRIAN WILLIAMS, anchor: We switch back to this country, primary day today, seven states and the District of Columbia . Here in New York , what could be a big story in the days ahead, a lot of problems with voting machines reported today. Now on the political front, what a lot of people are watching closely is whether voters are in an anti- Washington , anti-establishment mood. They're watching what happens tonight in Delaware , for example, with great attention, where there's an important GOP Senate primary. It's where our own Kelly O'Donnell is stationed tonight. Kelly , good evening.

KELLY O'DONNELL reporting: Hi, Brian. People are watching Delaware because this little state has big implications for the rest of the country. What's happening here is really a vivid example of the conflict within the Republican Party about what kinds of candidates and what brand of politics could work best in November. There is a Senate seat here, it belonged to Joe Biden , it's up for grabs. Republicans all chose Mike Castle , who's won more elections in Delaware than any Republican. And then in just the last two weeks, an insurgent tea party candidate named Christine O'Donnell came out of almost nowhere to be a serious challenger. Why? Outside tea party money, Sarah Palin 's influence and real tension in this race. Now, there have been questions about whether she's qualified. Her financial history and work history has been a part of this race. She says she's had hard times, but that means she can understand what voters are feeling. What happens here matters elsewhere because Republicans have viewed this seat, Delaware , as a chance to take something away from Democrats . For Democrats , they believe this is an important place to protect because this is Joe Biden 's home, and that's a symbol for them. So this could be a very important measure of the outsider/insider rift we're seeing all across the country. Brian :

WILLIAMS: All right. Kelly O'Donnell in Delaware tonight. We'll have more on what happens tomorrow evening. Kelly , thanks.