The National Football League is claiming ownership of the phrase "Who Dat" and shutting down retailers selling shirts and other products emblazoned with the phrase in New Orleans, prompting Sen. David Vitter (R-La.) to send a letter to NFL Commissioner Roger Goodell urging the league to "drop this obnoxious" position. "Please either drop your present ridiculous position or sue me," wrote Vitter, who is producing his own "Who Dat" shirt to invite the league to challenge it in court.
