You must have a way to spam Drudge or change your IP address for each vote. If not, then if you attempt more than one vote, you get the following:
Thank you, we have already counted your vote.
You just vote, delete the drudgereport cookie, go back to Drudge, vote again, delete the cookie, rinse and repeat. You could vote however many times you are willing to sit there and do that. Paulbots tend to be dedicated to this sort of spam activity, which is why he does so well in unscientific online polls. He also has fans on 4chan and places like that where the population do nothing but sit on a computer all day looking at porn and causing trouble.
These kind of polls are 100% entirely worthless. They literally mean nothing. Drudge no doubt runs them for the same reason most media do, to drive traffic to the website.