Because the first thing I think of when I hear "Republicans" is "comedy"
Damn. I can't believe I missed this.
Update: Okay, upon further examination, I think this is a joke. As in, it's not actual right-wing comedy, but a parody of same. Which, if you actually went to see it, would likely be quite funny, but is not nearly as funny to make fun of. So, uh, nevermind.