All three Republicans running for Tennessee governor this year have voiced support for a legal challenge of the health-care law."I don't think that is going to be successful," Frist told reporters after a speech Thursday to educators in Nashville.Knoxville Mayor Bill Haslam, U.S. Rep. Zach Wamp of Chattanooga and state SenateSpeaker Ron Ramsey of Blountville joined the race after Frist decided in January 2009 not to seek the GOP nomination.Frist said he supports the president's efforts to reduce the number of uninsured people."From a justice, fairness and equity standpoint, I'm very proud of this administration and that America has addressed this," Frist said. "On the other hand, most of the American people don't agree with this legislation.""It just scares people. The American people just don't trust government," he said.