Something I read about guys on http://gregpalast.com/
4000 college kids in Florida were tricked into re-registering Republican at a phoney address (and thus knocking out thier votes) when they thought they were signing a petition to legalize medical marijuana.
I think Bush's win owes a lot to these kinds of dirty tricks. I won't go so far as to accuse him of stealing the election though, because that seriously underestimates the Republican machine. But is this a "mandate to spend political capital?" I don't think so.