Yes, he's acting that way. What if he's not in clinical shock, and he believes in everything he has said and done over the last few days?
Now that is frightening.
Then he's delusional and you should soon see his supporters and staff dropping by the wayside. There have to be some people close to him who will confront him. They have until Sept. 25 to get a judge to approve his dropping out. Hopefully events will transpire between now and then which will compel them to do the right thing.