U.S. Supreme Court immigration case weighs states' powers
(Reuters) - A clash over immigration law will go before the U.S. Supreme Court this week, pitting the state of Arizona against President Barack Obama in a case with election-year political ramifications for him and Republican rival Mitt Romney.
http://www.reuters.com/article/2012/04/22/us-usa-immigration-arizona-idUSBRE83L04I20120422