House leaders' reconciliation bill is on thin ice on Monday evening as multiple Republican lawmakers threatened to defect.

The Senate plan, passed last week, does not include Medicaid cuts. The Senate budget resolution omits tax policy but sets the spending agenda to enact Trump’s border, defense and energy policies, punting negotiations on tax policy to a later date and breaking up the spending plan into two separate measures.

The House GOP’s plan to pass a large chunk of President Trump’s agenda is set to face a key test this week when the conference looks to adopt a budget resolution, which would set the legislative process in motion.