This is why some Koreans wanted Trump as the president of the U.S.A. for the next 4 years.

They were hoping that Trump would somehow bring the unification of Korea.

And Moon thought he had a good chance to achieve his dream of Korean unification

under Trump policy. Well, sorry, it was a good day dream.

I believe it was Moon's and Korean's misunderstanding of Trump's true intention.

See, Trump did pay attention to North Korea just for his political ambition and propaganda

to get personal glamors. He never thought about unifying Korea. It wasn't on his agenda at all.

Actually, the U.S. does not want Korea to be united into one stronger country with nuclear power.

If that ever happens, the U.S. will have to deal with two formidable competitors in Far-east Asia,

those are China and unified Korea both.

I am sure Trump or any other presidents of America would have said,

"No thanks. I am sorry but we don't want that."

The situation for China is exactly the same.

The Chinese "chickens and pigs" don't want to have a "big bad wolf" next door.

My point is that both Koreas have to unify by themselves alone, not by a third country.

A puppy may bark at the moon but he gets nothing back from it.

I couldn't agree with you more. Frankly speaking, I was very hopeful that 

Trump might have made it happen two years ago. So did many Koreans then.

But I came to a conclusion that Trump could not change rock solid 

U.S. policy on NK nuclear weapons. U.S. knows NK would not give 

up nuclear weapons no matter what US does to NK. But US will continue 

to ask NK to do so because Japan, SK and Taiwan will ask US to allow them

to have nuclear weapons if US accepts NK as a nuclear nation. 
So, the sanctions will keep SK from trading with NK. The sanctions imposed 

on NK by US(UN) will not end unless NK give up nuke. 남북교류 is impossible 

for now until Kim dynasty is overturned by some reasonable government that 

can be accepted by international community. In my opinion, SK government 

should patiently wait until then. The most desirable thing to do for SK is the 

activities that can undermine Kim dysnasty secretly. 

https://news.joins.com/article/23978063?cloc=joongang-home-newslistleft

[출처: 중앙일보] 정 박 "文 대북정책은 짝사랑···기업 총수 동반 방북때 美 우려"

The primary objective of American NK policy is to protect SK from NK aggression. 
SK is essential for the security of Japan. Japan is the fortress of the Pacific Ocean 

against China and Russia. The unification of Korea by SK is a good thing but it is not 

something that the US will pursue at any cost. 
 

US and SK have failed to change the attitude of Kim's regime with negotiations over 

the years. Both countries should stop negotiations with them. While waiting for the 

implosion of the regime, both countries should try to facilitate it. The current sanction 

is one of them. Crazy Trump was crazy to try to convince Kim to give up his nuclear 

arsenal in exchange of an economic miracle. If Kim gives up nuke he is nothing important 

in the world stage. If he opens up his country, his regime will not survive. Kim dynasty 

is just impossible but doomed.

https://news.joins.com/article/23978373?cloc=joongang-home-opinioncolumn

[출처: 중앙일보] [예영준의 시시각각] 김정은의 시간, 문재인의 시간