Conservatives happier?

Only if, in my experience, by "happier" you mean angrier. But,

newly published research from Canada finds a “significant association” between authoritarian attitudes and a subjective sense of well-being. These findings are “in line with evidence that conservative ideology … may promote positive psychological outcomes...

First thing to say is that happiness is something other and larger than "a subjective sense of well-being."

Second thing to say: what J.S. Mill said.

I never meant to say that the Conservatives are generally stupid. I meant to say that stupid people are generally Conservative. I believe that is so obviously and universally admitted a principle that I hardly think any gentleman will deny it.

Study: Extreme conservatives make happier people - Salon.com
Thanks to DH for the link.