Yes, it's already happened. More to follow is my guess. I think I'm through emailing, calling or writing reps in D.C. as I don't believe they can or have the will to truly do anything about it. The enforcers answer to no one but their appointed dept. chiefs and they answer only to the current administration who have made it plain they answer to no one.
If you want an effective letter-writing campaign, gather the names of govt. agents in your local branch offices and bombard them individually. As I see it, these are the people you need to win over and/or influence. The boots you may feel pressing down upon your individual rights and freedoms will not be those of Obama or Holder, but a long line of unremarked agents who hide behind the notion of just doing what their told. In some ways they are more dangerous to our rights than the sycophants and true believers as they may know what they are being ordered to do is wrong yet follow them anyway. Not to try to make some sort of dramatic comparisons, but historically speaking, almost all of the atrocities and injustices of dictatorships are carried out by "Average Joes" with no greater vision than the next paycheck. Scary , huh?
So in the mean time, lawsuits will be filed, judgments rendered, appeals filed and reviewed. I can't help but feel though that the motivations which led to the issuing of the many questionable at best executive orders and rule changes, hold more weight to this administration than the legal processes they were intended to get around in the first place. I'm not giving up on what I believe, but being repeatedly out-flanked would seem to call for a review of tactics.