When Americans talk about immigration, they picture those they want to keep out: undocumented people sneaking across the southern border. But, as Bloomberg’s Kathleen Hunter reports, when U.S. businesses talk about immigration, they picture people they’d like to bring in: ones with science, math or technology skills, notable artists or those willing to pick tomatoes. The U.S. wants these immigrants. The ‘other’ immigration problem, then, is in deciding who and how many should be admitted.