I guess since you missed the many time he has spoke on it you are just ignorant of the facts. He is the only candidate that has stated repeatedly that Common Core will be gone on the first day.
Ignoring what he has actually said shows a disdain for reason.
I have also heard him say that he will keep Common Core. Hmmm. He must be one of those fellas who tends to talk out of both sides of his mouth. Has he done that before? Why yes he has.