affiliate phil mattingly with a breakdown of the senate republican health care bill. phil, we now have the cbo score. tell our viewers what it suggests. >> reporter: an all important number or numbers, wolf, especially for those republican senators who have been either sitting on a fence or saying they weren't yet ready to support this bill. on the top line, according to the cbo, 22 million fewer americans have insurance over the course of a ten-year period. that obviously is not a good top line number, something republicans that i'm talking to say is higher than expected. here's why. there are changes in the senate bill compared to the house bill particularly on the tax credit side, the slower phase out, the more gradual phase out of the medicaid expansion they thought would boost the coverage number from the house bill which was at 23 million. so, not a huge change there. you also have to look at the reduction spending. there are dramatic reforms to the medicaid program. the types of reforms conservatives have been pushing for for a long time that would cap the federal funding based on enrollees. that would lead to $772 billion less spending for that program over the course of a ten-year