Hey, Republicans. We have been where you are now. The year was 2004, and we liberals could not believe that President Bush was leading John Kerry, a candidate that most of us liberals did not like but had embraced in what turned out to be a vain effort to defeat President Bush. We sought out any argument that proved that the polls were false. Those arguments were that the pollsters were sampling too many Republicans. Sound familiar? And how did that election turn out? The polls were right, much to our chagrin.
The polls are right now. President Obama is winning and winning convincingly. Indeed, according to Nate Silver, there is now more of a chance that Barack Obama will win by a landslide than Mitt Romney will win at all.
There is one basic fact that Republicans now and we liberals in 2004 ignore when we discounted polls: polling companies want to be right because that's their business model. If they are accurate, they get more business from media organizations and candidates. Remember, media organizations and candidates and party organizations and other organizations hire and pay polling companies and institutes to perform the polls and get accurate results. If they are skewing polls for reasons other than being accurate, then they would lose money. You should understand this Republicans. It's free market capitalism.
Now, there are some polling organizations whose business model is not to be accurate but to drive narratives in the media. Rasmussen is one such example. They get paid not to be right, but to be favorable to one side. So Republicans, as always, you are so very good at projection. The thing you decry is the thing you rely on.