Later this week, the Senate will vote on a continued spending resolution to keep the government funded. 

Last week, the House passed H.J.Res. 59, which would fund the government through mid-December but defunded ObamaCare. Senate Majority Leader Harry ReidHarry ReidGOP frustrated by slow pace of Trump staffing This week: Congress awaits Comey testimony Will Republicans grow a spine and restore democracy? MORE (D-Nev.) filed two amendments to that measure to strip out the language defunding ObamaCare and change the funding date to mid-November. If the amendments pass, the measure would be sent back to the House for final approval.

The government would shut down Oct. 1 if Congress doesn't approve some form of government funding measure.

McConnell and other Republicans are trying to encourage vulnerable Democrats up for reelection in red states to vote against funding ObamaCare as a way to prevent implementation of the law.

Republicans argue that the law harms the economy, while Democrats point out that the law is already benefiting those with preexisting conditions who can’t be denied coverage, people younger than 26 who can stay on a parent’s insurance plan, and women who now pay less for preventive healthcare.

McConnell is up for a tough reelection race himself. His Tea Party primary opponent has criticized him for not supporting Sen. Ted CruzTed CruzFEC faults Cruz on Goldman Sachs loans in rare unanimous vote CBO score underlines GOP tensions on ObamaCare repeal Republicans go to battle over pre-existing conditions MORE's (R-Texas) effort to defund ObamaCare by threatening a government shutdown.