Maybe they can invite Kim and his sister?
There is no reason to not keep Russia in the cold for as long as it takes for it's dictator to fall. Give Putin an inch, he will take your arm and beat you to death with it. (That is a Biff-ism from BTTF who's future American dystopia character was really and truly based on Trump the writers said).
The man is a poisoner, who false-flag attacks his own citizens, murdered who knows how many soviet style and intentionally drove Syria to get revenge for sanctions he deserved. You all probably saw how he would not touch that reporter handed to him and gestured to the table. That is because he will not touch anything for fear of poison.