In Iowa, at a Tama County Republican forum Monday, six candidates for the GOP nomination mixed it up. On Immigration, one candidate, Pat Bertroche, an Urbandale physician, said, “I think we should catch ’em, ... and micro-chip them. I can micro-chip my dog so I can find it. Why can’t I micro-chip an illegal? “That’s not a popular thing to say, but it’s a lot cheaper than building a fence they can tunnel under."