The controversy sparked two years ago by Arizona's law targeting illegal immigrants has landed in the Supreme Court. Federal lawyers say parts of the law unconstitutionally infringe on the federal government's authority over immigration policy. But states' rights advocates say states have the right to act in the face of what they call "lax enforcement" of federal laws. Guest host Sara Terry asks how a ruling by the court will affect the debate, and what impact it will have in this fall's elections. Also, aides say Newt Gingrich will drop his presidential bid and endorse Republican rival Mitt Romney. On Reporter's Notebook, a calm response to the news that a case of mad cow disease has been found in California.
Banner image: A woman holds a Christian icon as she demonstrates against Arizona's SB1070 law in front of the Supreme Court April 25, 2012 in Washington, DC. (Photo by Karen Bleier/AFP/Getty Images