Neal Boortz: Rep. Maxine Waters is an “idiot” who “should be cleaning restrooms”

Ann Coulter: Without affirmative action, Rep. Waters couldn't get a job “that didn't involve wearing a paper hat”

And, of course, Don Imus famously referred to Gwen Ifill as a “cleaning lady”

Why is it that when some conservatives think of successful African American women, these are the first things that pop into their minds?