Some Republican senators are considering the possibility of a narrow, standalone healthcare bill that would ensure funding for Obamacare’s insurer subsidies, but are getting resistance from House Republicans.

The Senate is wrestling with how to handle a larger, House-passed bill to partially repeal and replace Obamacare. But that process could take months, and insurers are nervous that these cost-sharing reduction payments could soon be reduced or eliminated by the Trump administration unless they are guaranteed by new legislation.