Republican Roscoe Bartlett's unsuccessful bid for an 11th term appears to have been his last. CNN projects that he lost to Democrat John Delaney, a wealthy businessman. The long-time western Maryland representative was a target for Democrats who redrew the district last year. As a result, his once-safe seat now stretches from the state's westernmost point to include a piece of heavily Democratic Montgomery County and reaches almost to the District of Columbia border.

Massachusetts 4: Joe Kennedy III (D) vs. Sean Bielat (R)

Open Democratic-held seat

After a two-year absence, the famed Kennedy family once again has an elected representative in national politics.

Joe Kennedy III will serve Massachusetts' 4th District, having handily defeated GOP opponent Sean Bielat, according to a CNN projection. The seat became open when longtime Democratic Rep. Barney Frank, who has been a leading proponent of financial regulations, announced this year that he was retiring.

Kennedy is the 32-year-old grandson of slain Sen. Robert Kennedy of New York. His great-uncles are the late President John F. Kennedy and long-time Sen. Ted Kennedy, D-Massachusetts, who died in office in 2009.

Joe Kennedy's second cousin, Democratic Rep. Patrick Kennedy of Rhode Island, left office in January 2011, ending his family's 64-year streak of service in the U.S. Congress.

Joe Kennedy is a former prosecutor and Peace Corps member; Bielat is a businessman and Marine Corps reservist.

Massachusetts 6: Rep. John Tierney (D) vs. Richard Tisei (R)

Rep. John Tierney, an eight-term incumbent, won re-election, CNN projected, despite being dogged by a financial scandal involving his wife and her brothers and an illegal gambling operation.

Minnesota 6: Rep. Michele Bachmann (R) vs. Jim Graves (D)

Tea party favorite Michele Bachmann won re-election, CNN projected. She was considered a shoo-in for re-election when she folded up her presidential campaign in January. Ten months later, Bachmann still had the advantage but she faced a tough challenger in Jim Graves, a wealthy businessman. Graves waged a competitive race in October, spending $1.2 million in TV ads, compared with $1.7 million for Bachmann. The conservative congresswoman had never posted huge numbers on Election Night, but redistricting made her district slightly more Republican.

Nevada 4: Steven Horsford (D) vs. Danny Tarkanian (R)

New district

Democrat Steven Horsford, the state senate majority leader, bested Republican Danny Tarkanian, a businessman and son of UNLV basketball coaching legend Jerry Tarkanian.

New Hampshire 1: Rep. Frank Guinta (R) vs. former Rep. Carol Shea-Porter (D)

Republican Frank Guinta lost to Democrat Carol Shea-Porter in the battle for New Hampshire's 1st Congressional District. Shea-Porter was elected in the Democratic wave of 2006 and served two terms before losing to Guinta in 2010.

New Hampshire 2: Rep. Charlie Bass (R) vs. Ann McLane Kuster (D)

Republican incumbent Charlie Bass lost to Ann McLane Kuster. Kuster had lost to Bass in the general election in 2010 but ran again and outraised Bass. The Democrat far outspent her opponent on the airwaves even though the national Republican Party invested funds on behalf of Bass.

New York 24: Rep. Ann Marie Buerkle (R) vs. former Rep. Dan Maffei (D)

Rep. Ann Marie Buerkle was elected in the Republican wave of 2010 and lost on Tuesday to the man she defeated two years ago. Democrat Dan Maffei, a longtime Capitol Hill staffer, won this upstate New York district in 2008 after it had been in Republican hands for almost 30 years. He lost the seat to nurse and tea party favorite Buerkle in one of the closest House races in 2010. The two had been evenly matched in fund-raising and TV ad spending. The district leans slight more Democratic.

North Carolina 7: Rep. Mike McIntyre (D) vs. David Rouzer (R)

Democrat Mike McIntyre ran a competitive race despite a newly redrawn district that skews heavily Republican. The Republican nominee was David Rouzer, a state senator. McIntyre, an eight-term incumbent, led in fund-raising and kept even with ad spending by pro-Republican outside groups and the national Republican Party. Rouzer stayed off the airwaves. Like fellow southern Democrat John Barrow in Georgia, McIntyre showed strong signs of life in a district that appeared to have been drawn to end his career. A winner has not been yet projected.

Ohio 9: Rep. Marcy Kaptur (D) vs. Samuel "Joe the Plumber" Wurzelbacher (R)

Samuel Wurzelbacher, better known as "Joe the Plumber," became a conservative icon in the 2008 presidential race when he challenged then-candidate Obama on tax policy at a campaign event. Republican John McCain even mentioned him during the third presidential debate. But four years later, Wurzelbacher's run for Congress was foiled by 15-term incumbent Democrat Marcy Kaptur.