You may also be aware that "The constitution " was also responsible for breaking Pakistan in 1971?
It was "Presidential " government system, same as USA.
But in their heads, both Bhutto and Mujeeb thought they won the elections .
Mujeeb got more votes, but Bhutto got more "Electoral colleges" . Same as Hillary clinton got more votes, but Donald trump got more electoral colleges.
Both Mujeeb and Bhutto slapped their own interpretation of "constitution " on each others faces, and we all know the result.