satisfy both conservatives and moderates. >> tonight a growing course of opposition to the bill from within the party. >> this bill is currently in front of the united states senate. not the answer. it's simply not the answer. and i'm announcing today that in this form i will not support it. >> reporter: for conservative it is bill doesn't go far enough. but moderates, who faces a 2018 election bid in nevada have concerns the bill negatively affects too many people. it calls for major changes to medica medica medicaid. >> the president said the house bill was mean. the senate bill may be meaner. >> under obamacare, states, if they choose to participate, receive federal funds to expand medicaid to provide health coverage for low income americans. the house bill would end medicaid expansion in three years and give states a block grant to fund medicaid as they see fit.