actually the stage has set, Zardari started on wrong foot, NS do not have to do much to defeat Zardari Led PPPP in next election, infact zardari is making sure that he don’t do anything which can help him winning the elections.
As u said, NS will go after 17th Ammendment and Supreme Court will tackle the NRO issue, NS have nothing to do with that, luckily ( for him) he was not the beneficary of it.
Zardari will be history soon, the PPPP shall be taken over by some other leaders, probably from sindh…
IF zardari decided to learn from his mistakes and start making up for them, then yes, he can beat NS or any other national leader i.e. Bhutto in the popularity, but it is something like we accept Danish Kanairia scores a century in T20 match…