washington u.s. president barack obama shorten prison sentence 111 convict serve time drug-related offenses second round clemency grant month white house say tuesday obama grant total 673 commutations presidency number grant 10 previous presidents combine seek reform criminal justice system say convict commutations mean serve half original prison sentence instance sly stallone aikens south carolina serve sentence 360 months use carry gun drug traffic crime serve 180 months one-third 673 convict serve life sentence obama make reduce number people serve long sentence nonviolent drug offenses priority one rare issue president get support republican lawmakers launch clemency program 2014 invite thousands drug offenders others seek early release ambitious program 40 years struggle flood thousands unprocessed case white house counsel neil eggleston say expect obama continue grant commutations end presidency end jan. 20. legislation pass congress achieve broad reform need ensure federal sentence system operate fairly effectively eggleston say obama shorten prison sentence 111 convict white house