The Washington Post reports a federal district judge in Pennsylvania has found several parts of the Obama executive action to forestall deportation of illegal immigrants (aka "amnesty") to be unconstitutional. The article's author, a law professor, doesn't find the judge's arguments persuasive.
On the other hand,
The Washington Times cites with approval the judge's opinion, he wrote:
President Obama’s unilateral legislative action violates the separation of powers provided for in the United States Constitution as well as the Take Care Clause, and therefore is unconstitutional.