President Donald Trump and Germany Chancellor Angela Merkel have agreed during a telephone call that NATO is fundamental. The White House said, despite the American leader's past characterization of the transatlantic military alliance as obsolete. <br/><br/>The president and chancellor also agreed on the NATO alliance's fundamental importance to the broader transatlantic relationship and its role in ensuring the peace and stability of North Atlantic community. It added that Trump will attend the upcoming G20 summit in Hamburg, Germany in July.