Senators are struggling with the possibility that in offering subsidized health insurance to millions of individuals and families, they could speed the erosion of employer-provided coverage that they want to preserve. Senator Max Baucus, the chairman of the Finance Committee, said senators were investigating "the ramifications and implications" of requiring employers to provide or pay for coverage. Baucus said he and other senators wanted to minimize the chance that employees "may be enticed to leave their firms in order to get health insurance in the exchange."