The early polling analysis so far is almost entirely dependent on voter registration alone. However, there are plenty of registered Democrats who despise Hillary - some even like Trump, some intend to leave the President line blank, and some are going third-party or write-in. The same is true on the GOP side, there are many who hate Trump with a purple passion and won't vote for him (Outside the National Review staff and DC, I'm not sure very many of them are actually voting for Hillary, but you never know). I just don't think the way the early voting is being analyzed has a really solid foundation. The Wicked Witch may win, or things could break for Trump, but I think most of the hot air and money wasted on it by the news channels is going to prove well-spent.