Believe it or not, there are still some Republican politicians who refuse to let go of the world’s stupidest conspiracy theory: Lawmakers look dumb for reviving Obama hoax.

Four Tennessee state representatives, all Republicans, have signed up to be plaintiffs in a lawsuit against President Barack Obama, aimed at forcing him to prove he is a United States citizen by coughing up his birth certificate.

Let me just say what all the world is now thinking, including their fellow Republicans on the Hill: This is dumber than a box of rocks.

Tennessee Reps. Eric Swafford, Stacey Campfield, Glen Casada and Frank Nicely now have a giant “G” on their foreheads for “Gullible.” The four were so willing to drink the craziest flavor of Kool-Aid, they’ve gotten themselves caught up in a national urban legend that has been thoroughly debunked.

(Hat tip: Dan Cleary.)