"Contrary to previous studies that found mental health outcomes may be worse for Democrats and Independents compared to Republicans, this study finds that depressive symptoms are virtually indistinguishable across party lines. The data showed 25.2% of Democrats screened positive for depression, compared with 23% of Independents and 20.5% of Republicans. These differences were not statistically significant, meaning that depression does not appear to discriminate by political belief."
https://publichealth.jhu.edu/2024/new-study-shows-bipartisan-struggles-with-depression-reveals-gaps-in-mental-health-care-access