Straight Talk Express? Or Going Senile?

In the Republican debate last night, Tim Russert asked Sen McCain about his statement where he said he doesn't understand the economy. Sen McCain quickly denied he said that and basically called Russert a liar for saying he did. Sen McCain, have you heard of Google? The days of saying something and then denying you said it are pretty much over. Case in point,

"The issue of economics is not something I’ve understood as well as I should" - John McCain