New television ads from Republican Gordon Humphrey?s gubernatorial campaign scoff at rival Craig Benson?s record in the business world. Benson co-founded Cabletron, one of New Hampshire?s biggest employers in the 1990?s. But the company hit hard times late in the decade. It spun off into four successor companies. One of them, Enterasys Networks is currently under federal investigation. And it faces a half a dozen lawsuits, alleging financial wrongdoing. That?s not the record Benson wants to focus on in his run for governor. NHPR?s David Darman has more.