>> reporter: the number of gop senators currently opposed to the legislation has grown to six, with at least three others expressing concerns. leadership can only afford to lose two votes to pass the bill. >> my state is medicare expansion state, and so we have a lot of issues. >> reporter: the cbo report also estimates that over the decade the senate bill would reduce the national deficit by $321 billion, largely by slashing medicaid funding by $772 billion, leaving 15 million fewer americans covered under medicaid, hitting older and lower income enrollees the hardest, while providing a $541 billion tax cut to wealthy and insurers, but legislation would initially cause health care premiums to rise, but would ultimately lead to a 30% reduction by 2020. >> he had several calls over the