I maintain it was an accident you maintain it was a plot by Stalin. We have our first conspiracy theory.
Either way he's dead as a doornail. It's in the cards cause I'm the dealer and that's the POD. If you say the POD in your what if is that Ceasar survives I'll discuss that there. Not say that it didn't happen. Or that it takes an ASB (which others, not you insist) I will grant it is very unlikly and will require that at least one NKVD officer is as dumb as gen'l Short but it is the very bizarness of his death that creates the problem for the comunists. He suceeded in accidentally executing himself.
Let Molotov or whoever explain that while keeping a straight face.
Well, let's flesh this out, then, because I think a simple acceptance is kind of weak and its probably relevant to determine how this could have happened.
Stalin decides to put his own name on the kill list for the NKVD, just to test their loyalty and force them to beg for mercy from Stalin. In his own mind, this is a surefire way to purge the NKVD, which has been getting too large for their own shoes.
Now, the NKVD leader (Yagoda? Yezhov? Beria?) recognizes this for what it is--a means to create an incident that will result in their own head. Out of desperation more than aggrandizement, the NKVD top leadership recognizes that Stalin has crudely signed their own death Warrant--but they still have a game to play. The NKVD recognizes that there is an out to its dilemma--it can actually make good on the order. Stalin will expect the NKVD to beg him for his mercy--but he might not be planning two steps ahead, where the begging and the pleading turns into a sudden reversal and the death of the general secretary of the Soviet Union.
Now, whoever is in charge of the NKVD just got into a massive pile of trouble--or more correctly, they knew that they were in this kind of trouble as soon as they saw Stalins Name on the kill list. So, the NKVD, knowing that terrible retaliation will follow, blames "Trotskyite Terrorists" for the attack, and follows up by killing or exiling Stalin's Loyalists. This becomes a forced coup, and it might be one that the NKVD can go all the way and emerge triumphant, or one that ends up with Stalin's desired purge in the works.
No matter what happens, the rest of the world is going to be massively confused over the outcome--just what is going on in the Soviet Union. If this is happening before Barbarossa, Hitler feels like the Soviet Union will fall to pieces if the Door is kicked in, and depending on how badly the nation reacted as a result this could be true. If its after WW2 is Over, I'd expect that the rest of the world would jump on the chance to cut into the Soviet Sphere of influence. Figure that this means that control of the Soviet Union--as well as its nuclear arsenal--is now disputed internally.
Either way, this is going to humiliate the Soviet Union in particular and Communism in General.