I've discovered the problem with the Republican primary polls. It's cats.

by John MacBeath Watkins

Just noticed this track of polling data from Real Clear Politics:

Looks like thing were going along in sort of a sane way, until about July. At that point, it's like a cat got into the threads of yarn. That's about the only way I can explain the utter chaos we're seeing in this chart.

Purple, or course, is Romney, blue is Perry, red is Cain.