I found that very interesting as well. Was Trump sending a shot over the bow? Will other candidates see this as a way to torpedo Cruz should he get the lead?
Personally, I would like to see Cruz challenged just to resolve this issue, which is not settled law. It should have been done with Obama. I anticipate that the courts will find in Cruz's favor, but I'm not totally convinced given the variables involved.
Cruz should welcome it, because the Dems will make it an issue should he get the nomination.
Cruz should lose, and Obama should be arrested. Cruz should then go on to a major cabinet position.