Currently looks like Trump has a better than 50% chance of being the Republican nominee.
He's such a wild card it's difficult to judge his chances after that. Looks likely the Democratic machine will make Hilary their / Goldmann Sach's candidate. However, she is widely unpopular and Trump might bury her in scandal - voters seem to ignore his own.
His supporters seem motivated by rage at their failing prospects rather than deep study of economics, world affairs, or science.
If elected, he might be able to do some of what he has promised, but much of it seems fantasy:
After his 4 Chapter 11 bankruptcies, I'm not convinced Trump's financial acumen trumps Claig's
And Trump can build his Mexican wall, but I don't understand how he can force Mexico to pay for it.
However, he might well be able to expell non-naturalised Muslims and ban entry of any more.
The Constitution allowed internment of Japanese Americans, so if there are further terrorist incidents in the US, he could even intern naturalised Muslims
A Republican Congress wouldn't stand up for Muslims. Probably not a Democratic one either.
Trump is motivated by money and ego, not ideology. I doubt if he has any genuine principles.
However, imo the candidates more likely to blunder into major wars are those incompetent idealists who want to "fix" the ME, or the bombastic willy-wavers who claim they'll get tough with Putin (who is more likely to escalate than to back down)
Trump wouldn't care if Putin bombs the ME to rubble.
Interestingly, he is the only US politician atm who doesn't seem to care what hapoens to Israel either, so he might not pull them out of a hole - unless he sees a profit.