brussels smile donald trump offer european union chiefs assurances security brussels thursday eu officials conceal linger differences u.s. president russia trade climate change leaders discuss ... share challenge fight global terrorism white house say statement agree need work together deepen security cooperation fight isis islamic state combat radicalisation respond common threats talk summit nato leaders atlantic military alliance headquarter across town eu source say trump also voice fear brexit could cost u.s. job possible sign second thoughts support british vote leave stun bloc trump also agree set joint eu-u.s. action plan trade indication new occupant white house set shun free trade deal promote protectionism europe fear might white house say unite state european union deepen strong economic relationship speak need protect u.s. eu industries unfair competition share concern come notably china nonetheless european council president donald tusk indicate less meet mind trade issue despite cordiality trump welcome agree many areas first foremost counter-terrorism tusk say eu chief executive jean-claude juncker meet trump hour issue remain open like climate trade european leaders urge trump abandon u.s. commitment cut greenhouse gas emissions make predecessor barack obama sign u.n. paris accord tusk also say feel trump exactly page term deal russian president vladimir putin although agree efforts end conflict ukraine west blame moscow result eu u.s. economic sanction russia spokeswoman juncker president european commission negotiate ambitious free trade deal washington know ttip trump upset election victory say two side would work increase trade intensify trade cooperation ... win-win situation side eu spokeswoman say agree start work joint action plan trade juncker decline comment whether talk come weeks might revive ttip trump make clear dislike multilateral trade agreements pull tpp agreement asian state however european leaders include german chancellor angela merkel suggest warm trade talk eu unify trade rule 28 state trump irritate eu leaders election campaign last year hail brexit suggest countries might follow britain 28-nation bloc eurosceptic leaders say would offer britain free trade deal leave however eu officials believe trump come appreciate since take office value european integration u.s. interest u.s. businesses take advantage single market reduce cost export europe eu source say trump tell tusk juncker worry americans may lose job result britain leave eu 2019 express concern job u.s. would lose brexit source say eu officials say meet constructive friendly tusk juncker joke trump eu two presidents complicate u.s. leader appear mix two remark january deepen concern brussels reality tv star white house fail take european union seriously trump wax lyrical first foreign trip offer distraction ethics question home notably allege campaign tie russia pope francis terrific trump tell tusk juncker welcome saudi arabia beyond anything anyone ever see tusk communist-era dissident list trump among risk world order alongside russia china islamist violence say try impress billionaire u.s. president need transatlantic cooperation promote value like human right selfish interest white house say meet reaffirm strong bond unite state europe anchor share value longstanding friendship trump talk trade eu vary differences remain