director gina haspel outlined those concerns saying north korea believes nuclear weapons are "essential to their regime's survival. there is also worry that improved relations between the south and north may undercut the urgency for kim to give up his nukes. sources say the president won't wait forever for action, but he is prepared to wait a while. >> how long do you leave the door open before you decide this isn't working? >> you have to remember this is a process that will move forwar forward. to set a date certain would be foolish, but make no mistake about it, the conversations that we are having are important. they're putting the opportunity to complete the denuclearization in place. >> are you optimistic that he will come through on this? >> yes. >> while north korea is getting platitudes this year, president trump will take a stick to iran on wednesday. >> he will call on every country to join our pressure campaign in