Being politically minded, I thought this was a great book. I find it hugely American with the reference to donkeys and elephants, so I struggle to think of ways that I could use it for Canadian Government. It would be a great resource for an American History course.
You could definitely talk about how not to run a campaign for sure. This election is getting ugly very quickly. 'Vote for Me!' could also be used to discuss persuasive texts. How do you convince people that you are right? For one thing, you don't act like the characters act in this text!
It's a fun text that is reminds me of 'Elephant and Piggie' books, purely for fun.