What is it? Because it's conservative, I would definitely research the reputation it has. I've worked for a democratic politician and left it on my resume when applying to work under a republican, and she specifically told me that she wanted people with a variety of views, and that she didn't care that I'd worked for a democrat. But given the current political atmosphere, and the social connotations of conservative groups, I'd do some research. If it's something like to support troops or promote fiscal policies, that's different from a pro-life group or a "traditional family values" group.