From an interesting post written by Pete Abel at The Moderate Voice:
Google didn’t give up on its fight and eventually succeeded in accomplishing something AT&T could not. Google convinced the Internet grassroots (including many bloggers) that this issue was not really a fight between titans, but a fight between one group of titans (the major ISP’s) and average people — people who wanted nothing more than to express themselves via the Internet. Thus motivated, the “netroots” (not all of them progressives, in this case) applied a constant drumbeat of pressure on Washington, slowly persuading one lawmaker after another that their fears were real.
Today, their cause is championed by the likes of Barack Obama, a lawmaker and candidate whom I generally respect. Unfortunately, there are at least two problems with proposals like those from Obama. First, they largely fail to distinguish between flagrant censorship and legitimate network management. Second, by curtailing the latter, they could have the exact opposite of their intended impact.
Related: Obama supports net neutrality.