Since I don't put a whole lot of stock in polls of any kind, I don't put much stock in this one either. On the other hand, I can think of reasons why it might be somewhat credible. For those who are interested:
PRINCETON, NJ — 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. (more. .)