Outgoing Dutch Prime Minister Mark Rutte is on track to bring the experience of leading four Dutch multiparty governments to the international stage as NATO’s new secretary general. On Thursday, Romania’s president withdrew from the race for the alliance’s top job, leaving Rutte the only remaining candidate and all but certain to head the world’s biggest military organisation from October. Rutte’s appointment could be sealed by a meeting of NATO ambassadors in the coming days, or when US President Joe Biden and his NATO counterparts meet for a summit in Washington on July 9-11. The NATO secret…