It’s hard to make your case or prove yourself when you are in hiding, avoiding all press interviews, etc.:
The McCain campaign scrambled to take control of the public debate over vice-presidential pick Sarah Palin, canceling her public appearances and teaming her with high-powered Republican operatives as she prepared for a speech Wednesday night that will be her first, and perhaps most important, chance to define herself to the American public. […]
In Minnesota she has stayed out of the public eye, a contrast with Democratic vice-presidential pick Sen. Joe Biden, who milled about the convention in Denver last week. Gov. Palin refused media interviews and canceled plans to appear at the Republican National Coalition for Life Tuesday.
And as Steve Benen put it:
Avoiding the media, over the long run, is a recipe for disaster. It won’t be long until people start asking, “If she’s afraid of CNN, how can she be expected to take on serious global challenges?”
Kevin Drum also chimes in:
This certainly demonstrates boundless confidence in Palin, doesn’t it? She’s great! But, um, no, nobody can talk to her. And of course that goes for John McCain too, who cancelled his scheduled appearance on Larry King tonight. His excuse: CNN’s Campbell Brown had gone “over the line” in an interview with McCain flack Tucker Bounds and he was mad about it. Anybody buying that? Normally I might just write it off to McCain’s famous sense of self-righteousness, but in this case it’s pretty obvious he cancelled his appearance because he doesn’t want to face the press either until he learns a little bit more about his “soulmate.” Not to worry, though. I’m sure the vetting will be done any day now.