I think the DNC has told her to take the low road for a while, much the same way they did to Terreeezzzaaa after Kerry's nomination. (I'm pretty sure they untied her after he lost...probably a bad thing.) I think they (correctly) recognize that Michelle's demeanor simply pisses people off.
Well, if this is true, then she took the lowest road of all.
Wow, what an ingrate and what lousy handlers she and hubby have.
Blam it on those damn white puppeteers.