Trump attacked D.C. as a criminal hellscape even though crime rates are at a historical low. He took advantage (see link) of the complicated law in place to "take over" the police functions there. I use those quotes advisedly.
He cannot permanently take control. Nonetheless, there are various ways he can interfere with local control. Also, he can bullshit about the hellscape part. Both are bad.
The catalyst of this specific activity appears to be (though maybe they were planning it anyway) an attempted carjacking involving a former DOGE worker with a stupid nickname. The incident happened, even if he exaggerated it.
Some data points don't change the overall fact that D.C. is not a hellscape. Or, that interfering with local government is wrong. We saw a preview of this a couple of years ago when some Democrats (a supermajority in the Senate, only a small fraction in the House) blocked a local crime bill.
One message that recent events show is that we need to have D.C. statehood. I have supported something less (home rule + a voting member of the House), but realistically, that would require a constitutional amendment. Statehood is the easiest way to defend voting rights and home rule.
The population warrants a voting House member, hopefully someone else than the current one, who is nearing ninety and is way past her prime.
Statehood brings a few other things, but I don't think they are problematic with a few other states with similar populations in place. The fact that D.C. has less unpopulated land doesn't do much for me.
(We can amend the Constitution to overturn the 23rd Amendment, but Congress can also just allot the electors by national population. So, that is not much of a problem.)
Someone elsewhere argued the current Supreme Court would not accept making D.C. a state. I think there are no good reasons constitutionally to deny statehood. But, stupidity is not a barrier for this Supreme Court. If so, that will provide an incentive to do something about the Court.
Short term, Trump can only do so much regarding D.C., and what he announced is, to some significant degree, a lot of blather. Longer term, it suggests that among the changes made should include D.C. statehood. The two senators will partially help to balance out the misapportioned Senate.
It is also a learning opportunity regarding talking about crime and what to do about it. We can continue to blather on about how "defund the police" is a stupid slogan. Either way, reducing the footprint of the police will promote public safety and police efficiency.
And, tangentially, we should get a clear statement from Puerto Rico on what it wants to do regarding statehood. Puerto Rico repeatedly comes up in these discussions. Size-wise, at least, there is no complication regarding its "state-worthiness."
Finally, in regard to "no taxation without representation" and all that, can territorial citizens overall finally be able to vote for president? Thinly populated territories might be too small to become states. They should have basic voting rights.
(SCOTUS overturning the Insular Cases can help in the battle to treat overseas territories as equal partners)
And, yes, Trump is a convicted felon, and should be convicted of a lot more. He commuted and pardoned over 1000 people involved in the biggest crime in D.C. history. There is a big degree of “yeah right” to him fighting crime in D.C.