Democratic Connecticut Sen. Richard Blumenthal said in an interview on Friday that he regretted attending a communist award show last week. The senator spoke at the Amsted Award ceremony on Dec. 11, where he honored the recipients with an honorary certificate. Speakers at the event regularly encouraged attendees to register with the Communist Party. "My understanding was that this ceremony was strictly a labor event,’' Blumenthal said Friday in a telephone interview with the Hartford Courant. "If I had known the details, I wouldn’t have gone. ... Let me just say very emphatically, I’m a Democrat and a strong believer...