I'm aware of that factor - but has that really been proven? In any case, if the elections were rigged, then the first thing Pakistanis should do is to ask for reformation of the election commission (or whatever its equivalent in Pak is). Asking Nawaz to leave is only treating the symptom, not the cause. Ask for a fresh, free and fair election with an independent election commission, or if that cannot be built up in time, then ask for international monitoring. Simply asking a govt to vacate will not work - the people in govt won't simply give up their chairs, unless the situation turns that grave or the army forces them out.
Yes, I agree that if the elections were rigged (I don't know if they were) then NS is not a representative of the people. But in that case, your problem is a lot more fundamental - your problem is not who is in power, but why you election commission is not independant, free and fair. That's not even a political isue - I mean, it is not a problem of which party is ruling. It is a problem with the state machinery itself.