I am by no means a fan of Notre Dame for personal reasons.  But I am glad that they did this.  Trump is so outside the boundaries of what Catholics find acceptable and to invite him to speak would be to normalize hatred and bigotry that is an anathema to the Gospel messages.  Catholic institutions should refrain from inviting Trump to visit to the extent possible.  I was for instance disturbed that Trump toured a Catholic school in Florida on Friday.  What if some of the schoolchildren were immigrants?  Could you imagine how scared they would feel?  Did they not think of their students being traumatized?