Lawmakers headed into the long Thanksgiving recess in stark disagreement over how, and when, to provide legal cover for undocumented immigrants brought to the country as children — legislation both parties say they want after President Trump rescinded the Deferred Action for Childhood Arrivals (DACA) program in September.

Behind Trump, GOP leaders are opposed to attaching any DACA provisions to legislation extending government funding, which expires Dec. 8. But Democratic leaders, pressured by their activist base and the Congressional Hispanic Caucus, are insisting that the DACA protections be finalized before year’s end. Many Democrats are threatening to withhold support for an omnibus spending bill if the immigration language isn’t included.

With just 12 legislative days left on the calendar — and the Republicans laser-focused on enacting a tax overhaul before Christmas — GOP leaders have some tough decisions ahead.