House Republican leaders are discussing using Friday’s deadline for a must-pass government funding plan to force the Senate to accept a bill without measures to stabilize Obamacare insurance markets that are drawing objections from conservatives, according to a Republican aide.

In the scenario under discussion, House Republicans would pass their temporary spending measure, with full-year funding for defense and money for everything else through Jan. 19, on a party-line vote. This would depend on Republicans standing together to pass their bill, thereby removing any leverage for Democrats.

The bill would be sent to the Senate, which is expected to strip out the long-term defense spending and add two health insurance measures to get support from Democrats — and fulfill a promise to GOP Senator Susan Collins of Maine for her vote on the tax overhaul.