He said all that, imagining he was speaking about himself. He will work very hard to undermine Trump. It is clear from his childish bitter interview the day before he dropped out that he despises Trump.
That moment told me it is about him, rather than about ideas.
He is butthurt.
I vs imagine a president ... We used to bust on Obama for how many times he would say “I” but not a peep about DT. There is the attitude.