There's a Nate Silver article "What explains the liberal-conservative happiness gap?" at https://www.natesilver.net/p/what-explains-the-liberal-conse..., although it seems to equate happiness with mental health.

With that caveat, the conclusion there is that "The liberal-conservative happiness gap persists across all demographics".

Meaning there is no demographic category in which liberals are happier than conservatives — "conservative gays and lesbians report higher happiness than heterosexual liberals".

Lol.