washington tentative plan u.s. secretary state john kerry visit cuba mid-march human right dialogue cancel two u.s. officials say thursday amid concern cuban government human right record kerry tell congressional hear feb. 23 might cuba next week two hold dialogue human right ahead president barack obama schedule trip island march 21-22. source say trip cancel u.s. cuban officials deep negotiations issue include dissidents obama might see havana trip timeframe kerry mention see constructive state department spokesman john kirby say update regard kerry potential travel cuba secretary still interest visit near future work cuban counterparts embassy determine best timeframe kirby say email statement u.s. critics obama open cuba complain president receive little return restore diplomatic relations former cold war foe feb. 24 cuban government grant seven dissidents prison parole one-time permission travel outside country apparent gesture unite state ahead obama historic visit kerry trip cuba right dialogue cancel u.s. officials