Republicans and Democrats appeared no closer today to reaching an accord on a plan to tackle the country’s growing budget deficits -- and couldn’t agree either whether talks have broken down. Members of the so-called supercommittee took the airwaves on Sunday news programs, saying they were not giving up -- despite growing pessimism. On Saturday, Republican Senator Jon Kyl of Arizona, had all but conceded that the panel had failed. But Representative Jeb Hensarling of Texas, the Republican co-chair of the 12-member deficit panel, declined to say whether talks have broken down -- but said the panel’s inability to reach a deal is a “huge missed opportunity.”