Here are races that could affect the balance of power and future of some well-known politicians. Keep checking back as we update with results.
The nation's comedians are following the Delaware Senate race, but are the state's college students doing so as well?
Obama is urging young voters to go to the polls in November. What are conservatives doing? CNN's Jeanne Meserve reports.
CNN's Tom Foreman takes look at the two major candidates running for Senate in Delaware.
If the polls are a reliable predictor, Chris Coons has the Delaware Senate race wrapped up.
Senate candidates Christine O'Donnell and Chris Coons debate unemployment numbers.
A feisty Christine O'Donnell attacked her Democratic opponent but also stumbled in Wednesday's debate with Chris Coons in their election battle for Delaware's U.S. Senate seat held for nearly four decades by Vice President Joe Biden.
Before Wednesday's Delaware Senate debate, the bulk of what people knew about Republican candidate Christine O'Donnell came from clips from a talk show from the 1990s.
In the days leading up to what looked like an upset win in Delaware's Republican Senate primary, Christine O'Donnell found out the perils of being in the national political spotlight.
Delaware voters were treated to a markedly different tone Thursday night as they watched their two Senate candidates together for the first time since the primaries.
Chris Coons may turn out to be the luckiest politician in America this year.
Christine O'Donnell talks about her stunning upset in the Republican senate primary in Delaware.