DUers are posting instructions on their site how to vote multiple times in this poll (one guy said he had already voted 25 times).
Online polls really mean nothing. It's whoever is willing to waste their time and manipulate the "system" that wins.
It's not just online polls - all polls are skewed. Think about who runs polling firms - and utilizes them to shape public policy.
It's a scandal of highest proportion, the bogus polls are bought and paid for, and then cited at a later date as gospel in order to further "progressive" issues. In this way, the sheeple have their basic core values transformed. Those not easily swayed by propaganda are then shut out, frozen, or isolated as holding "minority" opinions.
In the political realm, polling can sway voters to not vote at all, or change their vote, even. Polling data is closely held, proprietary, and organizations that poll won't even tell you who they are, etc.