Attorney Withdrwal and Professional Responsibility - Real Life Oakland City Attorney Example

When state and federal law are in conflict, what is an attorney to do?  Read the article from the link below published in The Recorder:

http://www.law.com/jsp/ca/PubArticleCA.jsp?id=1202481727157&src=EMC-Email&et=editorial&bu=The%20Recorder&pt=The%20Recorder%20News%20Alert&cn=20110214&kw=Oakland%20Hires%20Meyers%20Nave%20for%20Pot-Farm%20Plan&slreturn=1&hbxlogin=1#