There's another thread running about this. On it i'm the lone voice saying that he should continue the tradition.
Like Trump or loathe him... he was democratically elected by American people.
We achieve little by not going - it would be an opportunity missed. By going Enda can talk directly to that awful man - he can highlight the plight of the undocumented Irish, discuss trade links, etc.
But the visit could be modified e.g. don't invite Trump here, take the opportunities to get out the message about the importance of fairness and respect for all. Yes, maybe Trump won't listen but there will be plenty of media there who will.