Why hasn't Congress demanded DNA proof from Rep. Bill Posey to prove he is not an alligator-human hybrid?

I am demanding a DNA test to determine whether Florida Congressmen are part alligator. I have had enough of the reckless whispering. But the rumor is, that the morning after the great Okeechobee Hurricane in 1928, Posey's grandmother got stranded with a gator, and fell in love. Now, obviously I don't want to go into any details, but they say the swamp rang with her screams of ecstacy, mingled with the insistent but gentle hissing of her reptilian Romeo.