You’re absolutely right, Gaffer. President Obama isn’t using “prosecutorial discretion.” His administration is completely rewriting the law.
Consider speed limits. The highway patrol has limited resources and may not be able to pursue every speeder. If the highway patrol could catch everyone, prosecutors may not have the resources to prosecute every case. Regardless, everyone who speeds is subject to the same law and can be prosecuted. The president, on the other hand, effectively raises the speed limit, and he does so even though he’s sworn to faithfully execute the laws.
The article’s author also pointed out that if people know the speed laws are effectively raised, it encourages them to speed even more. That opposes the reason for having the speed limit in the first place.
Obama has instead put bags over the speed limit signs and ordered police not to enforce any speed limit, under threat of job loss or other official sanction.
That's the exact sentiment of Judge Hanen's extended order. Hat tip to Ray76 for this link.