If she's not the dumbest and most unprofessional, she's certainly in the top ten.
Most of the rest are at MSNBC too, of course.
Today she put her hoof squarely into her big mouth by trying to dress down Congressman Mo Brooks (R-AL) after he disagreed with one of her screeds on how Obama saved us from an economic depression. Brooks said that he didn't think so, and Brewer snarkily popped back: "Well do you have a degree in Economics?"
Turns out that the Congressman does. With honors. In addition to his Political Science degree and his Law degree.
You know who doesn't have a degree in Economics? That's right. Contessa Brewer. Just a little B.S. in Broadcast Journalism, per her Wikipedia page. Apparently she slept through the class where they taught that it's not your job to advance your own opinions and then try to belittle the subject of your interview when he responds. There is a reason why he's the one being interviewed and you're the one reading questions.
Contessa Brewer. Catty, mean, openly biased, politically slanted and too stupid for prime time. But just right for MSNBC, though.