new york national security major u.s. election issue bomb new york new jersey hillary clinton donald trump seek burnish foreign-policy credentials monday meet world leaders unite nations clinton democratic presidential nominee return role know well serve president barack obama secretary state four years trump republican nominee newcomer global stage hurriedly try play catch-up rapid succession clinton meet briefly japanese prime minister shinzo abe egyptian president abdel fattah al-sisi ukrainian president petro poroshenko trump also meet sisi minutes egyptian leader speak clinton manhattan hotel meet come day start clinton suggest trump harsh rhetoric toward muslims aid islamic state militant group recruit efforts trump push back argue unite state less safe result obama clinton policies security question arise monday bilateral sessions take place world leaders gather u.n. general assembly clinton abe discuss concern north korea maritime issue involve china clinton trump speak sisi work closely egypt combat islamic state threat trump campaign release statement say trump highlight egypt u.s. share common enemy importance work together defeat radical islamic terrorism clinton sisi also discuss goal move egypt toward new civil society new modern country uphold rule law respect human right liberties clinton poroshenko address russian incursions ukrainian territory clinton start session say ukraine face real problems threats russian aggression anxious know supportive session also resonate trump praise russian president vladimir putin early month trump call putin strong leader obama rattle democrats republicans washington even without drama start clinton motorcade zoom pack new york streets rush hour quickly rush hotel hotel trump also try bolster foreign policy credentials last month go mexico meet president enrique pena nieto side end disagree whether would pay build border wall discuss clinton call episode embarrass international incident clinton trump vie world leaders attention new york