In the 2024 election, Trump's strongest margins appear to have been with Gen X, where he was roughly +10% over Harris, even stronger than his results among the Baby Boomers.

(See, e.g. https://www.pewresearch.org/politics/2025/06/26/voting-patte... and https://www.nbcnews.com/politics/2024-elections/exit-polls. Annoyingly, the polls don't cleanly break down into generations; Gen X would be the ~44-60 crowd for that election.)