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

The United States Senate will vote on Thursday on a Republican-proposed alternative plan to address expiring Affordable Care Act subsidies, Senate Majority Leader John Thune said on Tuesday.

The subsidies, which help offset premium costs for the plans, also known as Obamacare, are set to expire at the end of the year, potentially impacting up to 24 million individuals reliant on the progr...