The Senate is set to vote on a Democratic health care proposal this week, a key tenet of the deal to end the government shutdown.

A vote on the possible extension of Obamacare subsidies was a key part of the deal to reopen the federal government last month, which ended the longest government shutdown in American history. Senate Democrats proposed a three-year extension last week on the subsidies that are set to expire at the end of the year.

Millions insured through the Affordable Care Act are facing higher health insurance costs in the new year, and Senators have yet to identify a bipartisan solution.

The Senate is expected to vote Thursday on a Democratic proposal to extend existing Affordable Care Act tax credits for three years. But the plan is not expected to get the votes it needs to advance.

The U.S. Senate on Tuesday confirmed two conservative Mississippi Supreme Court justices to serve as federal trial court judges, despite what Democrats called their extreme stances on abortion, LGBTQ rights and sentencing.