Here is what I fear.  

This is a rare opportunity for many foreign leaders (this kind of trip may never happen again in Trump's term.)  Foreign leaders will be very anxious to meet him, to see if all the outraged, stunned, perplexed free-world media coverage is true.  Can the man be as unpredictable/unstable/ignorant as portrayed?  Now they will have an opportunity (afforded some other world leaders in the U.S.) to take the measure of the man for themselves. Woe is America. 

Make no mistake: allowing this President to tour internationally will have HUGE consequences.  Most of them, I fear, negative to the U.S., and the western world in general.