At this time it appears that Democrats have the political power to block any attempt to repeal of the Affordable Care Act in the US Senate and are expected to do so, according to policy experts who advise the health insurance industry. However, Republicans do have enough votes for a budget-related bill to remove funding for the cost-sharing federal subsidies and the expansion of Medicaid.
So it appears that coverage for the lowest income individuals is threatened but other parts of the law remain safe for 2017.