2010 Delaware elections

In a widely publicized Republican primary, Michael Castle, the former governor and nine-term U.S. Representative for Delaware's sole congressional seat who was initially heavily favored to win the primary and then the general election, was defeated in an upset by Tea Party movement-aligned marketing consultant Christine O'Donnell.

Coons went on to defeat O'Donnell, as well as minor-party candidates Glenn A. Miller (Independent Party of Delaware) and James W. Rash (Libertarian), by a wide margin.

In this race, Democrat Chipman "Chip" Flowers Jr., a 35-year-old attorney from Middletown, narrowly edging out Republican Colin R. J. Bonini of Magnolia, a 45-year-old state Senator representing District 16.

[1] In this race, longtime State Auditor R. Thomas "Tom" Wagner Jr. of Dover, the Republican nominee and 21-year incumbent, won a sixth term in office by just 2,563 votes (0.8 percent) over Democratic nominee Richard Korn of Wilmington, the president and CEO of Franklin Strategies, a political consulting firm.

[2] In District 7, incumbent Democrat Patricia M. Blevins, who has served in the Senate since 1990, defeated Republican businessman Fredrick R. Cullis, 61-39 percent.

In District 8, Democrat David P. (Dave) Sokola, who had been in the Senate since 1990, defeated Republican first-time candidate A. Louis Saindon, 60.6-39.4 percent.

Cook was the only General Assembly incumbent running for reelection to be defeated and the only Democrat-to-Republican flip (Democrats picked up two state House seats).

Booth, a dry cleaning-store owner and former Georgetown mayor, Indian River school board member, and seven-year state House Representative, won a special election to replace longtime Senator Thurman Adams, a conservative Democrat, who died in office.

In heavily Democratic New Castle County, Democratic nominee Trinidad Navarro, 40, a senior corporal and chief media spokesman with the New Castle County Police, won with a very wide margin, defeating Republican William Hart, a commercial construction project manager and Independence Party of Delaware candidate Joseph O'Leary.

[10] In Kent County, Democrat Norman Wood of Camden, a Smyrna Police Department lieutenant, defeated Republican incumbent Sheriff James A. Higdon Jr. of Dover.