Addressing what he says is a major shortfall in congressional Democrats' plans for a healthcare overhaul, Republican U.S. Sen. Saxby Chambliss of Georgia is co-sponsoring legislation he says would cut down on frivolous malpractice lawsuits. President Barack Obama and other top Democrats agree that medical malpractice litigation is part of the problem behind high healthcare costs, but they have suggested that it should be up to individual states to experiment with how to deal with the issue. The proposal by Chambliss and Sen. Lindsey Graham, a South Carolina Republican, would reach much further, the Atlanta Journal-Constitution reports.