From the point of a foreigner who lives in the US currently, one of the problem of here is inequality and social safety net IMO. Poor public medical service is one of the example--in Korea, I paid only $50 for using emergency room, while here maybe costs over $500 or $5000.

If Trump wins, I think this unstable and unequal system will be exacerbated, which turns in the crisis of the US from its inside in the future. But who knows... this is just my two cents.

Disclaimer: I'm a fan of Robert Reich