You and I may know that but your average voter probably doesn't, and they certainly wouldn't two or three years later when it come back up out of context, in a attack ad.
This seems a key failing of our system: people that try to be moderately informed (the best you can reasonably expect - the vast majority can't/won't be political wonks) may end up even less informed in part because the relationship between voting record and the appearance of that record is radically distorted by this kind of thing.
So what can be done about this? It's hard for me to imagine a structural remedy.
So what can be done about this? It's hard for me to imagine a structural remedy.