though someone probably does it. But there probably aren't a lot of those cases because the majority of cases in federal court are either civil cases involving commercial litigation (businesses vs. businesses) or white-collar criminal cases. Criminal cases are only about 17% of total cases filed in federal court. Ellis does have a history of opposing long mandatory minimum sentences.
In April, confronted by a 28-year-old armed robbery convict facing a mandatory minimum 82-year sentence, Ellis' frustration grew so intense that he balked at imposing what he called a "very severe" sentence. Instead, the judge recruited a high-powered law firm to scour the law in search of some way to avoid imposing what is effectively a life sentence on Lamont Gaines, who was convicted of a string of robberies of 7-11 stores and a check-cashing business.
The judge appointed Daniel Suleiman, a former aide to Attorney General Eric Holder, to come up with any argument that might help Gaines win a more lenient sentence. Suleiman, a partner at Covington & Burling, set on one possibility: a Supreme Court ruling in April that invalidated a law very similar to the one requiring the lengthy sentence for Gaines.
https://www.politico.com/blogs/under-the-radar/2018/07/06/t-s-ellis-mandatory-minimum-sentences-697826