President Barack Obama and Russian President Vladimir Putin need one another, an uncomfortable truth for the superpower leader waging a tough re-election campaign and the newly elected Russian leader who is deeply suspicious of the United States.

The two men will use their meeting Monday, the first since Putin returned to Russia's top job, to claim leverage. Much of the rest of the Group of 20 economic meeting will be devoted to the European fiscal crisis and the fate of Greece as a part of the euro zone. A pro-euro candidate is trying to form a coalition government following elections Sunday, but the anti-austerity second-place party has refused.

"I expect that it will be a candid discussion, it will get down to business," White House deputy national security adviser Ben Rhodes said ahead of the lengthy morning meeting between Obama and Putin.

"We'll be able to sustain cooperation in some areas, we'll have differences in other areas, and we'll work to try to bridge those differences."