After a frenzied week of small group meetings, leadership listening sessions and private committee discussions, House Republicans are still grappling with core disagreements over how they will extract $1.5 trillion in savings over the next decade. Questions over how to overhaul Medicaid and which tax provisions to pay for are front and center and the divides are still so entrenched that GOP members and aides aren’t ready to begin hearings next week on key elements of the bill.