COMMENT Years from now, Malaysians will be asking how Pakatan Rakyat failed to capitalise on Umno/Barisan Nasional’s weakest moment and instead embarked on a senseless bout of internecine bickering such as we are witnessing at the moment. Pakatan, that historic opposition coalition to the Barisan Nasional, is teetering on the brink of collapse as leaders in the component parties continue to demand the exclusion of erstwhile partners from the coalition.