Obama to meet Xi, European allies next week: W.House

President Barack Obama will meet key European allies and China's Xi Jinping during an upcoming three-country overseas trip, the White House said Friday, hoping to reassure partners after Donald Trump's shock election.

Obama is expected to meet the leaders of Britain, France and Germany during a visit to Berlin and will hold a bilateral meeting with China's leader on the margins of an Asia-Pacific summit in Lima, Peru, said top Obama advisor Ben Rhodes.

Trump's election has thrown delicately balanced geopolitics into flux.

US President Barack Obama shakes hands with President-elect Donald Trump in the Oval Office at the White House on November 10, 2016 ©Jim Watson (AFP)

During the long election campaign, he called into question long-standing alliances, global agreements on climate and Iran's nuclear program, and appeared to side with Russia on key policy issues.

"We expect the election will be the primary topic on everyone's minds, wherever we go," said Rhodes.

The White House wants to stress that through previous administrations, Republican and Democratic presidents have held fast to alliances with allies in Europe, Japan and South Korea.

"There are certain things that have endured for decades," said Rhodes.

But he acknowledged "the incoming administration will make its own determinations."

In Athens, Greece, the birthplace of democracy, Obama will deliver a speech that now throbs with historical significance.

Across America and the world, questions are being raised about Trump's respect for the rule of law and the separation of powers.

Rhodes said that Obama would address "the need to respond effectively to the issues that have been raised by globalization."