Fallows:

...in the wake of her catastrophic performance in the Katie Couric interview, Sarah Palin has set expectations so low that she is very likely to do "surprisingly" well against Joe Biden on October 2. That is, to seem more flustered and incoherent than she did against Couric, Palin would have to move herself into "Eagleton zone," where her presence on the ticket would no longer be sustainable.

We passed that moment three weeks ago.

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