Conservatives more susceptible to political swindles than other voters?

This isn't surprising. There is always someone trying to "prove" that conservatives are less intelligent than the oh so enlightened liberals. 

I like how you think. To be honest the first thing that came to my mind was guillable people who think they know about politics but end up regurgitating whatever they hear. I've seen these kinds of people in all political spectra.

I think this study was a little biased in terms of how it was conducted, because it was about how much value people place on forms of speech, which is something that everyone uses in everyday life. It says in the article that the subjects were asked to say "yes" or "no" in whether some phrases hold meaning to them, like "the wet don't fear the rain"...But when you think about it, these kinds of phrases hold meaning to most of us and are not necessarily to be seen as a means of persuasion.