Ego. What billionaire doesn't have an over inflated sense of self confidence? Also likely surrounded by people who won't say no to him.
Maybe. But, as I understand it, he qualified (due to the DNC changing the rules for hi) for the last debate, but didn’t show. Maybe it’s the plan to enter late and with some voting momentum, rather than enter early and linger, as the other candidates have done.
We’ll see.