More Reasons the Polls are Wrong!
One - No poll is measuring cell phone users, unlisted numbers, people who have moved or changed numbers within the last six months, and often people who have not voted in the previous election. And let's not even pretend that the polls adequately measure minorities. Up to 20% of the population is off the map, and most of them are Democrats.
Two - There is a built in fudge factor on the polls and that allows the pollsters to spin it the way they want. It's called the "likely voter" qualifications. Notice how almost all the headlines talk about "likely voters" and you have to really dig to find the results for all voters in the poll. Recently several polls were released on Ohio and Pennsylvania that had Bush up among "likely voters" by two points, yet among all voters, Kerry was up by three points and four points. Each poll defines "likely voters" for itself. In other words, they can make the poll say what they want it to say.
Three - The right-leaning media WANTS to portray this race as tight; wants to portray it as "President Bush holding a slim lead against the tenacious challenge by Senator Kerry - who will win? stay tuned!!!!" When you look past the headlines into the data, you see that Kerry IS ahead. Talk about something funky going on . . .
Fourth - Even Zogby says the "horse race" poll is basically meaningless. That one is for the right-leaning media which loves six-word headlines and soundbites. The real polling is the state polling, which is more methodical, more accurate, and of course, the actual vote that will elect the president - the Electoral College. When you look at the state-by-state races, you see a veritable landslide for Kerry. Zogby has it Kerry 278, Bush 207 with Ohio, Florida, and Arkansas too close to call. You need 270 to win, so Kerry already has the winning margin. LA Times has a great site where you can play out scenarios with the Electoral College. If you are honest about what the state polls are saying you come to the conclusion that Bush is way behind where it counts.
Fifth - SmilingMonk mentioned that the undecideds break 2:1 for the challenger at the last moment. Correct. Zogby points out that less than one in five undecideds think Bush deserves to be reelected. As in - he won't be. Bush would need a five point lead to win on election day.