President Barack Obama points to someone in the crowd as he arrives to speak about immigration at Del Sol High School, Tuesday, Jan. 29, 2013, in Las Vegas. (AP Photo/Carolyn Kaster)

Sen. Ben Cardin, D-Md., a member of the Senate Foreign Relations Committee, arrives for the panel's vote on Sen. John Kerry, D-Mass., to become America's next top diplomat, replacing Secretary of State Hillary Rodham Clinton, on Capitol Hill in Washington, Tuesday, Jan. 29, 2013. (AP Photo/J. Scott Applewhite)

President Barack Obama waves as he arrives to speak about immigration at Del Sol High School, Tuesday, Jan. 29, 2013, in Las Vegas. (AP Photo/Carolyn Kaster)

In this Monday, Jan. 28, 2013 photo, a group of Hispanics play a dice game at a park in Los Angeles. Seeking swift action on immigration, President Barack Obama on Tuesday will try to rally public support behind his proposals for giving millions of illegal immigrants a pathway to citizenship, as well as making improvements to the legal immigration system and border security. (AP Photo/Jae C. Hong)

Mexican immigrant Roberto Garcia, center, and son Alan, left, look at wrist watches while shopping in Los Angeles, Monday, Jan. 28, 2013. Seeking swift action on immigration, President Barack Obama on Tuesday will try to rally public support behind his proposals for giving millions of illegal immigrants a pathway to citizenship, as well as making improvements to the legal immigration system and border security. (AP Photo/Jae C. Hong)

President Barack Obama exits Air Force One with Secretary of Homeland Security Janet Napolitano and Secretary of the Interior Ken Salazar upon his arrival at McCarran International Airport Tuesday, Jan. 29, 2013 in Las Vegas. (AP Photo/David Becker)

President Barack Obama speaks about immigration at Del Sol High School, Tuesday, Jan. 29, 2013, in Las Vegas. (AP Photo/Carolyn Kaster)