Conservative Republicans are poised to lose another fiscal fight this week as leaders in Congress prepare a $1.2 trillion government spending bill that will increase domestic costs instead of imposing the cuts they want.

House Speaker Paul Ryan and Senate Majority Leader Mitch McConnell plan to rely on Democratic help to push the bill through over the conservatives’ objections. If Congress can’t pass it by Friday night — or agree to a temporary spending extension — the government could partially shut down for the third time this year.

Lawmakers are set to release details of the spending plan late Monday. So far it’s unclear whether the measure will include funding for President Donald Trump’s U.S.-Mexico border wall, money for the Gateway rail tunnel between New York and New Jersey that Trump seeks to block, or immigration provisions sought by Democrats.