“The history of the United States is in part made of the stories, talents and lasting contributions of those who crossed oceans and deserts to come here,” Kennedy wrote. “The National Government has significant power to regulate immigration. With power comes responsibility, and the sound exercise of national power over immigration depends on the Nation’s meeting its responsibility to base its laws on a political will informed by searching, thoughtful, rational civic discourse. Arizona may have understandable frustrations with the problems caused by illegal immigration while that process continues, but the State may not pursue policies that undermine federal law.” Judge Kennedy