I've said it before, but will say it again here: Clark was a registered lobbyist for Acxiom corporation in 2002 and 2003. Here are the forms, via the Senate Public Records Web Site.

Acxiom is a company that focuses on data integration, and the one of the chief special interests behind CAPPS II. They also specialize in helping direct marketers annoy you more effectively.

A good question for Clark is whether he'd wear the Suspected Terrorist Pin.