I do not think Michelle would run.
1. She just wants to spend money and partay.
2. She is really unintelligent - dumb, stupid. No way could she handle even the public duties of being president.
3. She is immature emotionally and wants adulation, she would not handle the criticism and intense scrutiny of a campaign, what to speak of being president.
4. The dirt she has hidden in her past is immense. It would be made known.
This is true. Her speeches are all for slobbering, sycophantic audiences.
If she had to speak to really intelligent, discerning crowd, she would fold like a card table.