Republicans are significantly more likely than Democrats or independents to rate their mental health as excellent, according to data from the last four November Gallup Health and Healthcare polls. Fifty-eight percent of Republicans report having excellent mental health, compared to 43% of independents and 38% of Democrats. This relationship between party identification and reports of excellent mental health persists even within categories of income, age, gender, church attendance, and education.

The basic data -- based on an aggregated sample of more than 4,000 interviews conducted since 2004 -- are straightforward.

http://www.gallup.com/poll/102943/Republicans-Report-Much-Better-Mental-Health-Than-Others.aspx