Most fact-check sites say that the Obamas surrendered their licenses because they chose not to further pursue law (and pay the fees and maintain their education). Even if it's as benign as this, one could still ask why they chose to do so after spending so much effort to get it in the first place. I'm sure the reason she'll give is that she chose to "serve the people" or something.
This brings us back to the first oppo research. Michelle Obama was Vice-President of the University of Chicago Medical Center earning $317,000/year, and she oversaw a program that diverted the poor away from the Medical Center to other medical facilities.
Furthermore, Valerie Jarrett was the was Chairwoman of the hospital's Board of Directors, and they approved hiring David Axelrod's PR firm to "sell" the diversion program to other medical facilities.
-PJ
Michelle is certainly vulnerable to good opposition research, but I can't put my hopes there because of the 24/7 Goebbels media support she will receive, and the 24/7 Goebbels media attacks President Trump will receive.
Fact-check sites offering speculation - good for a laugh.
Most attorneys I’ve heard or read of, especially ones in politics, make sure to retain their licenses since they can fall back on attorney-client privilege if and when they need it.
G. Gordon Liddy, whatever you think of him, used to do this as a matter of course. ‘Give me a quarter - now you’re my attorney’ etc.