Daniel Zambrano, of Tijuana, Mexico, holds one of the bars that make up the border wall separating the U.S. and Mexico where the border meets the Pacific Ocean, Thursday, June 13, 2013 in San Diego. Illegal immigration into the United States would decrease by only 25 percent under a far-reaching Senate immigration bill, according to an analysis by the Congressional Budget Office that also finds the measure reduces federal deficits by billions. (AP Photo/Gregory Bull, File)
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