The Fix (a WaPo political blog) asked its readers to name the "most overrated Senator". They responded by naming John McCain (R-AZ), by a reasonably healthy margin. But The Fix writer is incredulous! Don't readers know that this is John McCain we're talking about? The maverick-y maverick of the Senate?
I concede that McCain has legislative accomplishments. What makes him overrated isn't that he doesn't do anything, it's that he's considered to be some sort of level-headed, sober independent, when in reality he's a pretty doctrinaire conservative on most issues, with a bad temper and a foreign policy disposition that basically boils down to "war rocks". Yet he gets trotted out on media talk shows with what can only be described as a reckless indifference to the scope of the contribution he makes to the public discourse. Hence, overrated.