ends. >> mark osler runs the law clinic at st. thomas university in minnesota. >> we have people serving time, over 5,000 people probably serving time under harsh crack laws that have now been undone by congress. >> among the 5,000 is clarence errand, in prison for two decades since the age of 23. a first-time offender, he was still given the maximum sentence for arranging a meeting between two drug dealers. three consecutive life terms in prison. obama has the power to release him right now. >> there's a lot of people now currently serving sentences. had they been sentenced today, they would already be out. >> dafna linzer, managing editor of msnbc.com, co-authored a series on the issue with "the washington post." >> it would take the president the stroke of a pen on ca commutations to right that disparity now. >> they invited the obama