|Adding fuel to the fire, IIRC, all 3 of our special election vitories were preceded by primaries. Bill Foster's win in IL-14 (at least for November) against John Laesch, was a much tougher battle than his win against Jim Oberweis.
A listing and some commentary follow with emphasis on upsets and close races.
The only primary that mattered in the New England House races mattered a good deal. Carol Shea-Porter surprised Jim Craig in a multi-candidate field and then won a close election to the House with just $290,000 in campaign expenditures (being outspent nearly 4:1). Nobody knows if the better known, more establishment Craig would have pulled it off. Shea-Porter depended mostly on volunteers and a lot of shoe leather, particularly her own. Her personal efforts in Manchester vs. Craig going door to door and bar to bar certainly paid off in both the general election and in the primary, itself.
NH-2 (Hodes) and the CT races (Joe Courtney, CT-2; Chris Murphy, CT-5, and Diane Farrell, CT-4 were all uncontested.
New York had six major races with three pickups and three close loses. Only one had a primary and that produced what was seeen on the blogs as an upset. In NY-19, John Hall won rather easily in a multi-candidate field converting his years as a local official and rock star status (singer with the band Orleans famous for "You're the One") into a comfortable victory over the much better funded Judy Aydelott and others (I remember Ben Shuldiner). NY-20(Kirsten Gillibrand),24 (Michael Arcuri), 25 (Dan Maffei),26 (Jack Davis), and 29 (Eric Massa) were uncontested. Gillibrand and Arcuri won in the fall.
PA produced four wins and one close loss. Two of the four winners (Jason Altmire and Patrick Murphy) faced primary challengers. Altmire got a fairly sturdy challenge besting Georgia Berner 55% to 45% en route to dethroning Melissa Hart in PA-4. Murphy had an easier time over Andrew Warren 65% to 35%. Lois Murphy had a token challenge against Anrew Leibowitz (76% to 24%) prior to losing versus Jim Gerlach in PA-6.
Elsewhere in the Northeast, Linda Stender had no primary but lost closely to Mikrke Ferguson in NJ-7. Peter Welch, a general election winner in VT also faced no primary.
Lest we forget, in OH-18 Zach Space coasted to an easy win in November but many thought Joe Sulzer would be the likely nominee. Space won in a multi candidate field. Only one of three close losers in OH faced a primary (Vic Wulsin who won in a multi candidate field including Thor Jacobs and Jim Parker). John Cranley and Mary Jo Kilroy had an open path to the general election.
Both Joe Donnelly and Baron Hill faced easy primaries and Brad Ellsworth went unopposed among three Indiana pickups. Tim Walz in Minnesota was also unopposed but Steve Kagen had to claw his way through a multi-candidate field including Wall and Nussbaum. I remember a lot of people touting Nussbaum.
Tammy Duckworth spent a bundle to secure the Democratic nomination by just 1,000 votes over Christine Cegelis. And provided a disappointing loss in November. Tim Walz in MN-1 had a clear field but Steve Kagen had to beat a multi-candidate field before he clould allegedly tell Karl Rove he was Dr. Multi-Millionaire.
John Yarmuth got 53% in a primary vs. Andrew Horne and others before taking on Anne Northrup in KY-3. Heath Shuler coasted through his primary but Tim Mahoney and Ron Klein in Florida got free rides. Close losers in the south also had to earn their way in with larry Kissell having an easy time but Christine Jennings (61%) drawing 2004 nominee Jan Schneider (39%) in FL-13.
In the Plains, Bruce Braley had a brutal three way battle against Dickinson and Gluba but Dave Loebsack had no opponent. Nancy Boyda wa unopposed. Nick Lampson and Ciro Rodriguez were OK (although this was Ciro's second go around in the cycle).
Out west, winner Harry Mitchell was unopposed butGabrielle Giffords won 54% in a multi-candidate fieldand Jerry McNerney had to upset the establishment fave, Steve Flson, befoe taking down Richard Pombo in the general. Ed Perlmutter also triumphed against two other strong candidates particularly Peggy Lamm in CO.
Western close losers Gary Trauner, Darcy Burner and Angie Pacccione were unopposed and Tessa Hafen won easily in NV with 58% in a multi-candidate field.
In short, the winners in pickup races were more likely to face a challenge, more likely to face a serious challenge and were forced to pull upsets against better funded opponents in a number of races. You would be hard pessed to make an argument for clearing the field based on these results.
Nasty blood fueds like Cegelis vs. Duckworth however were damaging and they should be avoided.
In the South, John Yarmuth (KY-3)