US President Donald Trump has outlined his new national security strategy, labelling China and Russia the primary threats to US economic dominance. His speech - which was based on his platform of "America First" - attacked the "failures" of past foreign policy. He criticised Pakistan and North Korea, and how previous administrations approached other world powers. The US faces a new era of competition, the US president said at the Ronald Reagan Building in Washington. Russia and China are "rival powers", he said, but the US must attempt to build a "great partnership with them".