In recent news, a bill in D.C. that stops employers from firing employees for failing marijuana drug-tests has passed. This means marijuana using employees are more protected. There are exceptions though, for instance, an employee an still be fired for consuming marijuana at work.
The article 'D.C. lawmakers pass a bill that would ban firing employees for failed marijuana tests' written by Ayana Archie goes into more detail about this new bill. Give it a read if you're a citizen of D.C., or if you're just interested in the development of marijuana's decriminalization.