Why not? We trusted idiots like George W Bush and Ronald Reagan with it. Don't get me wrong, I'm in no way a Trump fan (except after sprouts) but I suspect the US advisors and staff are WAY more sensible than some of the material they have to nurse around the White House and Capitol Hill.
Nope, according to my American friends (mostly, but not exclusively, Democrats), although he is currently a front-runner in the Republican nomination race, he isn't likely to win it: they all point out it is very early in the election race, and there have been several other front-runners in recent months: Rick Perry, Rick Santorum, Herman Cain, Newt Gingrich, hell even Michelle Bachmann had a spell in front of the polls. And even if he did win the nomination, he'd be ripped apart in the debates if he had to go up against someone like Hilary Clinton. There is one theory that those standing against him are more than happy to allow him in the race because Trump makes them look good (and that's saying something when you've got the likes of Cruz or Chris Christie in the running). And although he may be leading the race at the moment, he's also leading the charge for the candidate Republican voters would be most dissatisfied to them, and while he has a 23% approval rating, 59% have an unfavourable opinion of him. Although Democrats would be more than happy for Trump to lead the Republican charge to be the next POTUS, he won't get the nod.
Yep, that is the nightmare scenario for the GOP: 54% of his supporters have said they'd vote for him as an independent, while only 20% have said they'd back whoever gets the Republican nod: that's as good as a 4-7% loss for the Republicans - enough to tip the balance in a lot of swing states.
Having lived in the US for a while, I can say that there are a lot of people who are way right of Trump and very eager to have a war with somebody ( Russia, Cuba, Iran to name a few). Many commentators regard him as near the centre of US politics, his main fault is that he is an arrogant person who fails to engage his brain before opening his mouth.