Imagine that you are Michael Bloomberg. As a billionaire, you know that your candidacy is anathema to the left, yet you will need their votes to win the general election. How do you square the circle?
By taking a page out of Trump’s book. Trump disguises mostly standard fare Republican domestic policy by thrilling the base with tweets that drive the left crazy. Go after him low, hard, and often. Remind the world on a daily basis that he’s a fat fraudster with orange hair and a fake tan who inherited most of his money from his daddy. If you do it memorably and successfully enough, even the left will come to appreciate you.
It might not work. In fact, it probably won’t. But what other chance does he have?