I adore Michelle Obama and the vast majority of her fashion choices. This outfit, however, is a horror to behold. Forget, for a moment, the hideous top and weird cardigan thing. Lets just say those were whimsical choices. The more important point here is that I just don’t think pants are flattering to her figure; dresses seem to pull her look together much better.
Also, she seems the type to always look good dressed up, but not so good in casual clothes. It’s most likely that the fancier clothes have more tailoring and thus fit her better, but I’m surprised that someone with generally impeccable fashion sense wouldn’t take the same care with the tailoring of all of her clothes. It’s not like she doesn’t have someone to take care of it.