So says the NRCC about these races, according to the Washington Post:
On the GOP side, the finger-pointing began soon after the results were clear. GOP officials faulted several lawmakers for blowing their races. For months, the National Republican Congressional Committee warned incumbents that this year’s headwinds could endanger them — even if they had not faced serious races before.
The NRCC went to Rep. Gil Gutknecht (R-Minn.) in the summer with a poll that showed him in real jeopardy in his race against teacher Tim Walz (D). Gutknecht did not adequately heed that warning, falling to Walz in the southern Minnesota 1st District.
In Iowa’s 2nd District, the NRCC noticed months ago that Rep. Jim Leach (R) could well lose to Democrat Dave Loebsack. National Republicans did not want to tip off Democrats to his troubles, so they decided against running ads there. Instead, GOP aides said, they decided to pay for a direct-mail effort on Leach’s behalf, but just as it was about to be sent out, Leach insisted it be canceled. He lost to Loebsack on Tuesday night.
In Pennsylvania’s 4th District, Rep. Melissa Hart (R) ignored repeated warnings from national Republicans to go negative early on her opponent, Jason Altmire (D). Hart waited — out of fear for raising Altmire’s name recognition. She waited too long.