President Barack Obama waves to reporters as he walks on the South Lawn of the White House in Washington, Tuesday, Jan. 29, 2013, as he returns from a trip to Las Vegas where he spoke about immigration. (AP Photo/Charles Dharapak)

Associated Press
President Barack Obama waves to reporters as he walks on the South Lawn of the White House in Washington, Tuesday, Jan. 29, 2013, as he returns from a trip to Las Vegas where he spoke about immigration. (AP Photo/Charles Dharapak)
President Barack Obama waves to reporters as he walks on the South Lawn of the White House in Washington, Tuesday, Jan. 29, 2013, as he returns from a trip to Las Vegas where he spoke about immigration. (AP Photo/Charles Dharapak)
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