The problem with UN Ambassador Susan Rice might be that she is too competent.We'd like to think that our ambassadors are representing the US, but they're first and foremost representing the President. If the President says X, an ambassador is supposed to toe the party line and say X as well; if you say Y, you're sending mixed messages and you're giving the President and Secreatary of State some major headaches.
Thus, Ms. Rice was staying with the party line on Benghazi, much to the consternation of critics of the administration. They would have liked her to go rogue and say "I'm not sure what the folks in the White House were being told, but it look like an al Qaeda-type operation to me." That would have been the Ms. Smith Goes to Washington thing to do, but she'd be working on her resume in earnest if she did.
Thus, she was being a bit too good of an ambassador, falling on her sword for the boss rather than deliver an inconvienient truth. That's not the first time that's happened in congressional testimony and it won't be the last.
Susan Rice seems a bit like a liberal analogue of her Stanford predicessor and namesake. The president is going to want someone who can reiterate the administration line to folks overseas and on the Hill, and she seems to be doing that rather nicely. Whether she has the gravitas and character to advice the president on foreign policy and talk him out of bad ideas is open to question as things go foward in looking for a replacement for Secretary of State Clinton.
Oh, and questioning it isn't sexist or racist; the administration's critics would give the third degree to anyone up for the post. If anything, they'll go a bit easy on her to avoid looking like a Neanderthal.
It reminds me a bit of a trailer for The Trials of Rosie O'Neill; Ed Asner was playing a collegue a bit against his arch-liberal real-life persona
"You don't like me because I'm a woman!"
"I'm a card carring member of NOW; I just don't like you."
John McCain might not have his NOW card paid up, but if he doesn't like Susan Rice, it's likely for policy rather than gender or race.