"It did not take long for Justice Antonin Scalia to side with
Arizona, and it was not much later that Chief Justice John G. Roberts,
Jr., showed that he, too, was inclined that way. Justice Clarence
Thomas, who said nothing during the argument, is known to be totally
opposed to the kind of technical legal challenge that the government has
mounted against S.B. 1070.
That left Justices Anthony M. Kennedy and Samuel A. Alito, Jr., as
the ones that might be thought most likely to help make a majority for
Arizona." - Lyle Denniston, Apr. 25, 2012.