The threat to keep government closed is exactly what I'd expected from 45.
Does it inconvenience him for it to be closed? Does it glorify Donald Trump to have a functioning government?
If the answer to both those questions is No, then it will stay closed.
This was in the works the instant Pelosi used the phrase in the Oval Office, "a Trump Shutdown".
He loves things with his name on, so from that moment was always going to shut down govt. Also, media are now showing graphs (pictures! Donald understands!) of lengths of previous shutdowns, and the Trump Shutdown isn't yet the longest. He'll want the biggliest shutdown.
Plus the disruptivists and anti-government billionaires will be thrilled – anything to further the principle of No Government...