Nate Silver does tend to lean left. If we look elsewhere, such as to Wall Street and Las Vegas where they use trading/gambling instead of polling, Obama is presently a 66.8% favorite on
Intrade and at 80% on
betfair.
Some right wingers call Obama the worst president since Hoover. If that's so, you'd think they could have come up with a candidate worth voting for, but they best they found was Captain Etch-a-sketch.