Based on the last time I read through our Constitution, I'd say the Babylon Bee is spot on here: Democrats Outraged After Court Rules Commander-In-Chief Of Armed Forces Can Command Armed Forces. (Article II, Section 2) The headline says it all, but here's an excerpt from the article:
Democratic leaders said that the ruling was a clear and present threat to American democracy and they feared for the future of a country where the person in charge of things could actually be in charge of things.
"This is an extremely dangerous precedent for the court to set," said Senator Cory Booker. "There is no way that the president should be allowed to exercise his constitutional authority to tell the U.S. Armed Forces what to do, as though he were somehow their highest-ranking commanding officer. These activist judges are trying to make Trump out to be some type of president or something."
At publishing time, Democrats were so outraged by Trump's overreach that they threatened to impeach the president for acting as the president.
I'll admit it is somewhat amusing, if also disturbing, that our natural tendency is to assume that an action—be it legislation, court ruling, or presidential initiative—must be unconstitutional because we disagree with it.
In this we all embody the quote attributed to Supreme Court Justice Thurgood Marshall: "The Constitution is what I say it is." (As far as I can tell, he didn't actually use those words, but they are a pretty accurate précis of his more nuanced position.)
I highly recommend reading the entire U. S. Constitution, including the Bill of Rights and other Amendments, at least once a year, to keep it fresh in our minds. For such a monumental document, it is surprisingly short, and takes only about half an hour to read through.