This news today:
"North Korea proposed on Thursday, 6 June, to hold talks with South Korea
on reopening the Kaesong Industrial Zone (KIZ) just north of the
Demilitarized Zone and on restoring almost all civilian connections with
South Korea that it severed in March and April."
Obama's policy of just keeping quiet has allowed Kim Jong Un to back off from his ridiculous confrontational stances of a few months ago, and return to what passes for normal in Korea.
If a Republican had been President, the U.S. government would have resorted to an endless series of belligerent statements and actions which would have guaranteed that the Korean situation would only get worse.
I think it is pretty clear now, as I said at the time, that Kim's hostility was intended for domestic consumption, to consolidate his position as head of the country. Of course, if we had responded in the Republican way, we could have easily turned this into a horrible international incident.
Not much more to say about this diplomatic victory for Obama, really, except that the mainstream press will ignore it, and the usual wingnuts will rip Obama for being a weakling, even though he has done all the U.S. could hope to do to let the Korean situation unwind without further damage.