He will try another shutdown, IMO.

Yes, he’s THAT stupid.

He's just making noise for his base.

It wouldn't shock me if he tries declaring the national emergency hoping that will appease his base.

Our Federal Government is one of limited powers. The three branches provided for by our constitution are given specific powers, different in each branch from those in the other two. That is the concept we know as separation of powers.
The tenth amendment (Bill of Rights) states: “The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.
Reading the constitution, a power to shut down the government is not delegated to any of the three branches, hence such power is reserved to the states or to the people. Does that not mean to any normal person that neither congress, nor the president nor the judiciary can shut down current lawful operations of our government?
But the constitution also says: “No Money shall be drawn from the Treasury, but in Consequence of Appropriations made by Law”. Also, Section 5 of Article I allows each house to determine rules of its proceedings. So when the senate majority leader held up a bill that would have avoided a shutdown but did not include the president’s demanded funds for the wall, was he correct?
I believe the answer lies in the ninth amendment of the Bill of Rights. “The enumeration in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people.” Does that not mean that any proceeding, though otherwise allowed, cannot be used to deny or disparage the right of a shutdown belonging to the people?
Since the president, the senators and representatives are bound by oath or affirmation to support the constitution, to answer your first question, hopefully not, and I believe in any case not legally.
On your second question, will the courts intervene? I believe our courts don’t do anything unless a suit is filed and a dispute needs to be settled. But someone has to do that. The courts did not intervene in the shutdown, because nobody in congress filed a suit to raise any of the points I tried to point out to you. Do they make sense to you? Or, as “My Cousin Vinnie” would say, does my theory hold water? Shortly we shall see what we shall see!