Trump-endorsed candidates would generally win even without his support, and that's usually the case with all political endorsements.
Based on the numbers alone, receiving a "Trump bump" seems like a surefire way to win an election. So far, 94% of Trump's favored candidates have won their Republican primaries.
But as a political scientist who studies voting and public opinion, I have my doubts about the true power of Trump's endorsements. Instead, it is more likely that most of the candidates Trump has chosen to endorse were already on track to win their respective races.
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