Jay McInerney, 56, is the author of Bright Lights, Big City and Brightness Falls. His latest book is the short story collection How It Ended Last week I was at a party in a Manhattan art gallery attended by the inevitable mix of artists, journalists and wealthy art collectors. I ran into a friend, a painter, who is a strong supporter of the Democratic party, but she told me she wasn't donating money to the Obama campaign this year. "He's been a huge disappointment," she said. "Not one major Wall Street banker has been held accountable for the financial crash,...