CHICAGO (AP) — World leaders weary of war will tackle Afghanistan‘s post-conflict future — from funding for security forces to upcoming elections — when the NATO summit opens Sunday.

President Barack Obama and Afghan President Hamid Karzai will huddle on the sidelines of the summit or an hour-long meeting. Their talks are expected to focus on planning for Afghanistan’s 2014 elections, as well as the prospect of a political settlement with the Taliban, a senior Obama administration official said.

Karzai has said repeatedly he will step down from power when his term ends in 2014, paving the way for new elections. NATO’s scheduled end of the war was built around those plans, with foreign forces staying until the 2014 election but exiting the country by 2015.

Obama and Karzai will discuss ways to ensure that political rivals can compete fairly in the run-up to the election, as well as ways to reduce fraud and support the winner who emerges, the official said.

Past Afghan elections were riddled with irregularities, and the U.S. applied heavy pressure to Karzai to schedule a second round of voting during the last presidential contest in 2009. The runoff was never held because Karzai’s challenger pulled out in protest of what he claimed was an impossible level of corruption.

The election chapter opened a rift between the U.S. and Karzai, who suspected that the Obama administration wanted to replace him.

The Obama administration has mostly repaired its relationship with Karzai, but mistrust remains on both sides.

The U.S. official, speaking on condition of anonymity to discuss sensitive diplomacy, said Obama and Karzai also plan a lengthy discussion of prospects for a political settlement or peace pact between Karzai’s government and the Taliban-led insurgency. The Taliban pulled out of U.S.-led talks in March, but separate talks among Afghan and other contacts continue, the U.S. official said.

The official said Obama would press his view that political reconciliation is essential to the country’s future security.

The national security-focused NATO summit caps an extraordinary weekend of international summitry. Obama and the leaders of the world’s leading industrial nations convened at Camp David, the presidential retreat in Maryland, for two days of talks focused in large part on Europe’s economic crisis.

Both the G-8 and NATO summits were originally scheduled to be held in Chicago, but the White House abruptly announced this spring that the G-8 would be moved to Camp David. Officials said the move was aimed at facilitating a more intimate discussion among the leaders at the smaller summit.

Joining Obama and many of the G-8 leaders in Chicago are the heads of NATO alliance nations and other countries with a stake in the Afghan war.

Prominent among those nations is Pakistan. Tensions between the U.S. and Pakistan have been running high following several incidents, including the U.S. raid in Pakistan that led to the death of Osama bin Laden and a U.S. airstrike that killed two dozen Pakistani soldiers.

Both countries have been seeking to restore normal relations. Pakistani President Asif Ali Zardari‘s acceptance of an invitation to attend the NATO summit was seen as an indication that his country would reopen key roads used to supply NATO fighting forces in Afghanistan, a key U.S. demand.

However, White House officials have indicated that Obama and Zardari will not hold a separate bilateral meeting until the supply route issue is resolved.