It could be acting???
The debates are coming, she did horribly in the forum, she cannot make any sense of the emails, classified info, the millions in contributions, and the foundation.
She needs to get out of the debates in some manner.
She's not well. I tend to believe her lungs may have some pooled water. I think there is an underlying cause that is being hidden.
Whether she plans to parlay this into a "get out of the debate" card depends on the polls. She'll bail out of the debate if she's ahead in the polls in the swing states.
Whether planned or not, this puts risk in Trump using the "low energy" and "low stamina" cards. Now she has a medical excuse, and as far as the public is being told, it's completely treatable.