A political scientist criticizes the media's approach to covering the election and their recent tendency to infer which candidate does and does not have "momentum" and what factors have contributed to the rise and fall of support for either Obama or Romney. Media narratives tend to be developed and repeated without enough self criticism to determine what the facts reveal.
He offers the following chart to mute the alleged impact the first debate had on shifts in support for either candidate - these were already underway prior to the debate: