The story

Pakistan's ruling coalition split on Monday after former Prime Minister Nawaz Sharif withdrew his party and vowed to nominate a rival presidential candidate.

The political upheaval comes one week after the coalition, which took power in March, successfully forced President Pervez Musharraf to resign.

The pullout brings further uncertainty to Pakistan, which possesses nuclear weapons and is a key ally in the "war on terror," fighting Taliban militancy and al Qaeda. Read full article »

All About Pakistan • Pakistan Peoples Party • Pakistan Muslim League • Pervez Musharraf • Nawaz Sharif