Among the unanswered questions is whether Republicans will immediately end health-care taxes, such as an additional 0.9 percent Medicare payroll tax and a 3.8 percent investment income tax, that were created to help pay for the Affordable Care Act. Some Republicans have insisted that the taxes should be eliminated immediately, even if lawmakers decide to delay the repeal of other parts of the law. Others worry that repealing the taxes will make it impossible to pay to keep Obamacare afloat while a replacement is finished.