Is Sarah Palin confused about Robert Frost?

Palin says of writer Joe McGinniss , who is camping out next door to her in Alaska:

Wonder what kind of material he’ll gather while overlooking Piper’s bedroom, my little garden, and the family’s swimming hole? Welcome, Joe! It’ll be a great summer – come borrow a cup of sugar if ever you need some sweetener. And you know what they say about “fences make for good neighbors”? Well, we’ll get started on that tall fence tomorrow ...

Andrew Sullivan--who thinks the Fox News consultant is misinterpreting "Mending Wall" --and his readers do some close reading:

I'm not out to set up Palin as a literary expert, but she is adopting a perfectly valid side of the argument . . .