Lots of errors and stretches on both sides. The bullet points in the above link are worth a look: they provide a good summary.
The weirdest item on the list:
McCain tripped up on one of his signature issues – special appropriation “earmarks.” He said they had “tripled in the last five years,” when in fact they have decreased sharply.
(more detail in the full article)
That’s an oddly specific and straightforward thing to get that wrong.
McCain’s focus on earmarks reminds me quite a bit of the talk about drilling. Sure, cutting down on earmarks and increasing domestic drilling will have some effect on those problems, but to place some much focus and importance on them creates a distraction from the real problems we should really be solving.