There’s a reason Donald Trump’s 2024 presidential campaign is working hard to evoke nostalgia: People who are nostalgic – meaning, people who long for America’s “good old days” – were more likely to vote for Republican candidates in the 2022 midterm elections, according to research I conducted along with collaborators Kirby Goidel and Paul Kellstedt.

The first day of the 2024 Republican National Convention kicked off with a nostalgic message from Virginia Gov. Glenn Youngkin imploring voters to back Trump and “make America the land of opportunity again.”

And in general, the 2024 RNC themes largely wax nostalgic with “Make America Wealthy Once Again” on Monday, “Make America Safe Once Again” on Tuesday, “Make America Strong Once Again” on Wednesday, and “Make America Great Once Again” on Thursday.

The American public leans nostalgic. Through the 2022 Cooperative Election Study survey, which is a collective effort across many researchers and research groups, we surveyed 1,000 U.S. adults and found that approximately 54% of the respondents to our questions agree that “the world used to be a better place.” Other questions we asked included “How often do you long for the good old days in this country?” and “Do you think the American culture and way of life has mostly changed for the worse or better since the 1950s?”

From their answers, we constructed a scale of how much nostalgia a person feels for America’s past, and we used this scale........

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