This is an article based on some of the diplomatic documents that have been leaked by Wikileaks recently. The article talks about documents having to do with the US relationship with Pakistan. The basic idea here is that the US needs Pakistan but, at the same time, needs to try to push Pakistan to do various things. The leaks show how hard it is to try to push a country to do something when you kind of need their friendship.
Here is a quote that pretty much summarizes the main idea of the article:
It may be the most unnerving evidence of the complex relationship — sometimes cooperative, often confrontational, always wary — between America and Pakistan ... underneath public reassurances lie deep clashes over strategic goals on issues like Pakistan’s support for the Afghan Taliban and tolerance of Al Qaeda, and Washington’s warmer relations with India, Pakistan’s archenemy.
The US needs Pakistan's help if we are going to be able to have any chance of "fixing" the problems in Afghanistan. At the same time, however, we are unhappy with them about things like nuclear weapons and the issues mentioned above. Finally, they tend to get mad at us over issues like our support for India and our military strikes in their territory.
So the basic idea is that it is hard to manage this relationship -- it's hard to try to make them be our friends while (at the same time) we push them to do things they don't want to do.