From UPI:
"The president began this conversation in Vegas and wants to make the point that he has been trying and he is back with something, and it's Congress that has been the obstructionist," Louis DeSipio, professor of political science at the University of California, Irvine, explained to the Wall Street Journal.
 
For the full story, please visit http://www.upi.com/Top_News/US/2014/11/21/President-Obama-officially-signs-immigration-executive-order-in-Las-Vegas-high-school/8021416606089/.