That screeching sound you heard from Washington, DC was the brakes being slammed on President Obama's unilateral amnesty efforts. Federal Judge Arthur Schwab has ruled parts of Obama's amnesty order unconstitutional.
Schwab 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." Of course, any middle school graduate with even a cursory understanding of the three branches of government didn't need a judge to tell them this, but it's unclear whether anybody in the Obama administration has graduated middle school.
Judge Schwab conceded that Presidents do have some discretion regarding enforcement of existing law, but that Obama's amnesty order has the effect of creating new law, which is Congress's job.
This decision isn't the result of a direct challenge to Obama's amnesty program. Schwab was ruling on a deportation case. However, the fact that a long-tenured, respected judge like Schwab recognizes the obvious unconstitutionality of Obama's amnesty program bodes well for upcoming legal challenges.
On a snarky, fun note, it's funny as hell to note that Schwab threw Obama's campaign words back in his face. If you remember, candidate Obama in 2008 repeatedy criticized the use of executive orders.