Donald Trump's foreign policy proposals would make the world a less stable place, former Secretary of State James Baker told a US Senate hearing on Thursday as the Republican presidential candidate met elsewhere with party congressional leaders. Under questioning from Republican Senator Marco Rubio, a former Trump rival in the presidential race, Baker said the world 'would be far less stable' with a weaker NATO or if more countries had nuclear weapons as Trump has proposed. 'We've a got a lot of problems today, but we'd have a hell of a lot more if that were the case,' Baker told a Senate Foreign Relations Committee hearing, adding that US commitments around the world 'promote US security.' Trump met with Baker on Thursday at Trump's request, said a Baker spokesman, who declined further comment.