One point about Fox News' decision to label Michelle Obama as her husband's "baby-mama": isn't it remarkable that a "conservative" news outlet would actually view a married black couple who have brought up two apparently great kids in wedlock as effectively unmarried:
The Oxford English Dictionary defines the term as one “chiefly in African-American usage” that refers to, “The mother of a man’s child, who is not his wife nor (in most cases) his current or exclusive partner.”
It's at that point that you suspect that what motivates the conservatives at Fox is not a concern about the black family or a belief that role models of good African-American marriages should be celebrated and supported. It's that the poor state of the black family can be used to marginalize and demonize African-Americans to garner ratings and support Republicans. It's really disgusting, but sadly unsurprising.