He had to do that before the next debate so Joe could shut down any question or challenge from another candidate. Trump is brilliant, throwing that out there. He is already campaigning hard and he has no official opponent. Expect Hunter to go back to laying low as long as Joe is a candidate.
Also, Trump comes out with this big trade deal that makes it look like China is very willing to do even more with Trump, and then we hear about this with Hunter.
Interesting timing.