I'm gonna say this once: My biggest problem with the Bachmann Newsweek cover is that she's on it at all.
Did they deliberately choose a photo that made her look bonkers? Of course. What do you think they do, sit around and throw darts at page proofs until somebody scores a bulls-eye and that's the one they use? Of course they used a photo that made her look like a lunatic, and of course they did it for the LULZ and the clicks and attention. They did it hoping she'd make a big fucking stupid deal out of it for her mouthbreathy followers and oh, hey, look at that, suddenly somebody gives a flying fuck what Newsweek is doing again.
Would they treat a male presidential candidate like that? No, but the real sexism here is that the only female presidential candidates, the only female politicians, who get this kind of treatment are the ones they want to single out as nuts or movie stars.
There are lots and lots of hardworking, smart, interesting women in politics today. They're just not celebrities, not on the scale of Bachmann or Hillary (everybody's other favorite punching bag), and so not as worthy of attention.
It's not that they only treat female politicians with scorn. It's that they ignore the fucking club of the most of them until one opens her mouth and says shit so mind-blowingly stupid that Republicans in Iowa want her to be their president.