Sorry, but she’s no Maggie Thatcher.
I think she will get better; she has already gotten better. She debated the 2 other candidates in the AK governor race and acquitted herself well enough to get 50%, IIRC.
Her facebook postings and op-ed columns shows she can understand the issues; she needs to translate that into debate speech, which is really what these interviews are. She needs to prep for them like a debate.
If she can do that, nothing will stop her. Even now she gets traction, but she may lose some if in a debate with Romney etc, she can not put him in his place and he looks to have more command of facts.