Barack Obama has shown "outstanding leadership" on NATO affairs, the chief of the military alliance said Wednesday, as he congratulated the US leader on his reelection as president, dpa reported.
"President Obama has demonstrated outstanding leadership in maintaining this vital bond, and I look forward to continuing our close cooperation to ensure NATO remains effective in a fast-changing world," Secretary General Anders Fogh Rasmussen said.
"The bond between Europe and North America, based upon the shared values on which our alliance was founded over 60 years ago, remains as strong and as important to the preservation of euro-Atlantic peace and security as ever," he added.
There have been some concerns that the transatlantic alliance could weaken after Obama declared the US a Pacific nation and announced the stationing of troops in Australia last year.
US leaders have also long been concerned about NATO's over-reliance on the country's military capabilities amid dwindling European defence budgets.