The senate unanimously passed a spending bill a few days ago to keep the government funded until mid-February. Trump stated that he will veto it because it doesn't include funding for a wall. There is likely support in the house to also pass a wall-less spending bill with a large majority.
Since both chambers seem to have a supermajority that support, they can override any veto that Trump will give. Why don't they just push this bill through, veto or not?
I know that when congress is not in session, the president can "pocket veto" the bill, but many news organizations are expecting the shutdown to continue after congress reconvenes in January.