Obama discusses Brexit with Cameron and Merkel - White House

U.S. President Barack Obama takes part in a discussion with Mark Zuckerberg and entrepreneurs at the Global Entrepreneurship Summit at Stanford University in Palo Alto, California, June 24, 2016. REUTERS/Kevin Lamarque

WASHINGTON (Reuters) - U.S. President Barack Obama discussed the British vote to leave the European Union in separate phone calls on Friday with British Prime Minister David Cameron and German Chancellor Angela Merkel, the White House said.

Obama assured Cameron that the special U.S. relationship with Britain and Britain's membership in NATO remained vital cornerstones of U.S. policy, the White House said in a statement.