What's the whole deal with Donald Trump? Is it something serious or is it comming in a bizarre way? I mean, does he stand a chance?

Also, what is like to discuss politics in the USA in general? I mean, how "fanatical blind" is people talking each other?
Here in Argentina is IMPOSSIBLE to discuss politics with someone who doesn't think the same. It's really sad. You can actually have a fight with a friend for political arguing.