Philip Wallach is a senior fellow at the American Enterprise Institute.
We can put a number on it by seeing how Trump-supported candidates did relative to those Republicans he did not endorse. If we look at all 401 contests in which a single Democrat faced a single Republican, there is not much difference. Relative to baseline expectations derived from their districts’ recent voting patterns (as calculated by the Cook Partisan Voting Index), 144 Trump-endorsed candidates exceeded their baselines by an average of 1.52 points. In 257 races where Trump did not endorse a general-election candidate, Republicans exceeded their baseline by 1.46 points.
But that similarity is driven mainly by Trump’s endorsements of many Republicans cruising to easy reelection in uncompetitive districts. If we focus exclusively on districts where the margin of victory was less than 15 points, such that the seat was conceivably in the balance, the picture that emerges is quite different.
In these 114 districts, candidates bearing Trump endorsements underperformed their baseline by a whopping five points, while Republicans who were without Trump’s blessing overperformed their baseline by 2.2 points — a remarkable difference of more than seven points.
To give a clearer sense of what this cost House Republicans, we can examine the election returns visually. In the chart below, the lower-right-hand quadrant shows races in which Republicans lost (the Republican margin was negative) even though the district had favored Republicans in recent elections (the expected Republican margin was positive):
Considering only competitive
races, with margin of victory
or loss below 15 points,
most Trump-endorsed
candidates underperformed
Candidates endorsed by Trump
Not endorsed
Republican candidates near this line
performed as expected
Margin of GOP win
15%
Above
expectation
10
5
Margin of
expected
GOP WIN
Margin of
expected
GOP loss
−5
Below
expectation
−10
−15
−10
−5
5
10
15
Margin of GOP loss
Sources: Cook Partisan Voting Index; Ballotpedia
(Trump endorsements); author’s calculations.
Philip Wallach for THE WASHINGTON POST
Considering only competitive races,
with margin of victory or loss
below 15 points, most Trump-endorsed
candidates underperformed
Not endorsed
Candidates endorsed by Trump
Republican candidates near this line
performed as expected
Margin of GOP win
15%
Above
expectation
10
5
Margin of
expected
GOP win
Margin of
expected
GOP loss
−5
Below
expectation
−10
−15
−10
−5
5
10
15
Margin of GOP loss
Sources: Cook Partisan Voting Index; Ballotpedia (Trump
endorsements); author’s calculations.
Philip Wallach for THE WASHINGTON POST
Considering only competitive races, decided by 15 points or less,
most Trump-endorsed candidates underperformed
Not endorsed
Candidates endorsed by Trump
Republican candidates near
this line performed as expected
Margin of GOP win
15%
Above
expectation
10
5
Margin of
expected
GOP loss
Margin of
expected
GOP win
−5
Below
expectation
−10
−15
−10
−5
5
10
15
Margin of GOP loss
Sources: Cook Partisan Voting Index; Ballotpedia (Trump endorsements); author’s calculations.
Philip Wallach for THE WASHINGTON POST
The orange dots, representing Trump-endorsed candidates, are plentiful in the area where candidates performed below expectations, while they are almost nonexistent on the other side. In other words, nearly all Trump-endorsed candidates in competitive races underperformed their expectations.
In some races, Trump-backed candidates fell well short of expectations but still won their seats. For example, Lauren Boebert, one of the House’s loudest election deniers, has a tiny 1,100-vote lead in her R+7 district, which should have been an easy win for the GOP. (The expectation would be a 57-43 win.)
But there are five races in which the Trump penalty was probably decisive:
New Hampshire’s 1st District, rated as dead even, is a closer call. Karoline Leavitt, a 25-year-old former assistant press secretary to Kayleigh McEnany, lost to Democratic incumbent Chris Pappas by eight points, 54-46. Another close call is Michigan’s 3rd District, rated as D+1. Incumbent Republican Peter Meijer would have been well positioned to defend his seat, although redistricting had made it less favorable for him. Instead, he lost his primary to Trump administration veteran John Gibbs, who attacked Meijer for his vote to impeach Trump. Gibbs lost decisively to Democrat Hillary Scholten,54.8-41.9.
We still do not know the outcome of the contest in Alaska, but Trump’s influence might well cost Republicans that seat, too. He threw his weight behind former vice-presidential nominee (and fellow reality TV star) Sarah Palin to replace the late Rep. Don Young (R) in a special election earlier this year. Using the state’s new ranked-choice voting format, Palin lost out to Democrat Mary Peltola despite Republicans winning more first-choice votes. The November election seems likely to repeat that result, giving the R+8 district to Democrats.
In short, Trump remains quite popular among Republican voters, and his endorsement was decisive in plenty of House primaries this summer. But close association with the twice-impeached president was a clear liability in competitive 2022 House races, turning what would have been a modest-but-solid Republican majority into (at best) a razor-thin one. For die-hard loyalists eager to see their party purged of any “RINO” elements, that might be a price worth paying.
But for those Republicans focused on building their party’s coalition and improving its performance in the 2024 presidential election (relative to Trump’s 46.1 percent in 2016 and 46.8 percent in 2020), the evidence from this year’s House races overwhelmingly suggests that conforming the party to Trump’s vision is an electoral dead end.