For the last five years the constant meme from the left has been "John McCain's selection of Sarah Palin cost him the presidency".
The facts are of course that post election polls showed that Palin was a plus for McCain, and that as is easily inferred from Biden's statement, the momentum the McCain team received from Palin's convention speech-where they moved ahead of Obama in the polls, could have well carried them to victory.
No team could have overcome the Bush legacy and then the massive economic collapse just before the election.The fact that McCain did as well as he did-almost as well as Romney, is a tribute to the Palin effect.
From Biden's mouth to the rabid lefts ears:
From a CNN report