Nate Silver attempts a bit of perspective as to The Donald's post-convention bounce:
Historically, it’s unusual for candidates not to at least pull into a rough tie after their party convention — John McCain and Sarah Palin did so in 2008, for example, and even Walter Mondale led a couple of polls in 1984.
I had forgotten that chapter of Mondale's polling history. But who could forget his going down, less than four months later, in a real squeaker: 525 to 13 Electoral College votes.