Gov. Mitt Romney's statement responding to the U.S. Supreme Court's ruling on the Arizona immigration law:

"Today's decision underscores the need for a president who will lead on this critical issue and work in a bipartisan fashion to pursue a national immigration strategy. President Obama has failed to provide any leadership on immigration. This represents yet another broken promise by this president. I believe that each state has the duty - and the right - to secure our borders and preserve the rule of law, particularly when the federal government has failed to meet its responsibilities. As candidate Obama, he promised to present an immigration plan during his first year in office. But four years later, we are still waiting."