The real question is can he prevent WWIII?
The real question (s)
1. Would Trump have engaged the Russians at the end of WWII and told them to get the hell out of Germany, and the other countries.... I say, yes he would have.
2. Would Trump have allowed MacArther to push our troops deep into N. Korea where they were trapped like rats by hundreds of thousands of Chinese? I’d say heck no. He would NOT have got us into Korea.
3. WWII? Don’t know. I think he would have unleashed Patton and the war may have ended sooner.
4. Japan, I think he would have dropped the bomb, maybe sooner, who knows.
Some think that by winning in 2016 Trump has already averted WW3.