havana cuba say would welcome president barack obama havana late month communist government intention change policies exchange normal relations unite state long editorial wednesday communist party newspaper granma official media cuba demand washington cease meddle internal affairs say obama could change u.s. policy white house brush piece defend president trip next month opportunity engage cuba government citizens obama visit march 20-22 15 months cuban president raul castro agree end five decades cold war-era animosity restore diplomatic tie obama relax trade sanction travel restrictions lead republican opponents president fellow democrats question whether washington offer much without reciprocation havana editorial make clear cuba still long list grievances unite state start comprehensive trade embargo obama want rescind embargo republican leadership congress block move cuba also object u.s. support political dissidents americans consider champion human right cuban government view unrepresentative minority fund u.s. interest unite state abandon pretense fabricate internal political opposition pay money u.s. taxpayers nearly 3,000-word editorial say white house spokesman josh earnest tell reporters obama long agenda include visit political opposition cuban government stand tangible way universal human right cuban people obama visit second u.s. president first since 1959 revolution lead fidel castro overthrow pro-american government editorial say cuba one assume cuba renounce principles cede slight bite defense two countries also negotiate great cooperation law enforcement environmental issue agree resume schedule commercial flight postal service obama remove cuba list state sponsor terrorism editorial acknowledge obama take positive step criticize limit nature existence regulations intimidation cause overall blockade force 50 years cuba issue bristle editorial ahead obama visit