Also, think about it. Democrats have most to gain from immigration inaction. DACA can still renew until supreme court ruling, no wall, no, border security, we still have visa lottery and chain migration.
Trump and GOP can try to blame it on Democrats but this doesn't make them look good since this will piss off both supporters.
I believe nothing will be done until March. Who knows, so far they have done such masterful job at screwing everything up so they might surprise me and extend it even further down the road.