Defining Con Ass
Whoever coined "con ass" is in for a lot of punning. "Coonass" is a shortened form of "raccoon ass" and is actually a term for Cajuns in Louisiana. It was first pejorative but then the Cajuns learned to embrace it as their own. Then if you read the link, you will stumble on the French word "conasse" which is worse but very apt for your representatives.
"In WWII, when American troops were stationed in France, it was necessary that the forces establish and maintain communication with the Free French Forces inhabitants. Naturally, the French-speaking Louisiana soldiers provided an invaluable resource. The French soldier, possibly threatened by his "long lost cousin," referred to the French-speaking American soldiers as "conasse." The French noun "conasse" is defined as a "stupid man or woman; used specifically for a bungling prostitute; to a prostitute without a health card; a man who does stupid things; grossly stupid person."