Trump wasted one of the biggest negotiating chips we have in these types of discussions, by legitimizing a brutal dictator with bilateral talks between him and the President of the United States. Something three generations of North Korean dictators have been begging for, and never accomplished. He followed up this legitimization by heaping tons of praise and accolades on this horrific, evil excuse of a human. Giving his propaganda that he will use to further oppress and brutalize his people for as long as he lives, and perhaps beyond. And then finally, at the end of it all, he lied to the world by claiming things were resolved and that the threat is finally over, which has proven to be completely untrue.
Yes, it took Reagan time. And he is likely rolling over in his grave seeing what Trump has done with this situation. I cannot even begin to imagine any President, but especially Reagan, treating a hostile threat in such an obtuse fashion.
Of course he did.