House Minority Leader Nancy Pelosi, D-Calif., is urging House Democrats to vote against a spending bill to fund the government if it does not include funding for Democratic priorities.

"House and Senate Democratic Leadership has continued to insist on parity in the CAPS, which we insist should include funding for opioids, veterans, pensions, NIH, and support for the DREAM Act," Pelosi wrote in a letter to Democrats. "Unless we see a respect for our values and priorities, we continue to urge a strong NO on the Continuing Resolution."

Democrats are expecting a spending package that will also include an $81 billion disaster relief bill that will be directed to Texas and other hurricane-ravaged areas, as well as California in the wake of the wildfires that ripped through parts of the state.

But it's not clear Republicans will be able to deliver those priorities in the spending bill that must be passed by Friday in order to avoid a partial government shutdown. If Democrats aren't satisfied, that would require Republicans to stay mostly united around the bill in order to have it clear that House, which has become increasingly difficult given conservative demands for spending cuts.

Republicans have not released their plan for the spending package, but details are expected to trickle out after a 5:00 p.m. conference meeting on Wednesday evening. A short-term package through January is expected, which will not include a healthcare provision negotiated between Sen. Lamar Alexander, R-Tenn., and Sen. Patty Murray, D-Wash., that would fund cost-sharing reductions to fund the Obamacare exchanges — a victory for House Republicans.