and good evening. i m tom llamas in for david tonight, and we begin with that breaking news from capitol hill tonight. the senate s plan to repeal and replace obamacare, facing an uphill climb. senate majority leader, mitch mcconnell, aiming for a vote by the end of the week. the president sounding optimistic, but there is resistance from a growing number of senators from their own party. resistance too at town halls in protest around the country. just today, this in bloomington, indiana, and tonight, the congressional budget office predicting that the plan would leave millions more americans uninsured while raising the premiums for the most vulnerable. abc s mary bruce starts us off tonight on capitol hill. have you made a decision? no comment right now. reporter: with the pressure mounting, tonight republicans are scrambling to negotiate. do you think you will get to yes? i m trying to. keep in mind what the real choice is. it s the republican bill that