If someone had the inclination, and the time, I imagine it wouldn't be too hard to write a little script that would repeatedly vote automatically for whomever. Set an upper limit of votes and possibly a slight delay so as not to overload the server.
You can open that link in Incognito mode on Chrome (and presumably the IE / Firefox / Opera equivalents) and vote as many times as you like. I got to ten before my boss started looking at what I was doing.