Pakistan election: the five biggest challenges for the winner

Pakistan’s next government will face myriad challenges, from unsustainable population growth to simmering extremism, all complicated by the decades-long tussle between civilian and military leadership. No matter who is voted into office Wednesday, the new rulers will have to make hard choices, and quickly. Here is a rundown of the biggest hurdles Pakistan is facing:
Extremism
Security has dramatically improved across Pakistan following a crackdown on militant groups in recent years.
But…