The problem is the feds can't decriminalize marijuana. That is against some of the joint treaties they've signed with other countries in the control of drugs.I did find this though.
House Democrats File Marijuana Legalization And Expungements Bill
A top House Democrat has reintroduced a bill to federally legalize, tax and regulate marijuana, with provisions to expunge prior cannabis convictions. Rep. Jerrold Nadler (D-NY), ranking member of the House Judiciary Committee, refiled the Marijuana Opportunity, Reinvestment and Expungement...www.marijuanamoment.net
And of course instead of a simple bill descheduling it and expunging records they got to load it up with all kinds of BS so they guarantee it will be shot down and they can blame the other side.......