In the coming weeks, President Barack Obama will announce executive actions designed to improve America's immigration system. While he is expected to focus primarily on people living and working in the United States without documentation, the president also should seize the opportunity to improve the legal immigration system that governs how highly skilled, foreign-born workers are employed in this country. By doing so, Obama can deliver on one of the top priorities of technology companies -- reform to an outdated visa program that restricts their ability to hire key talent.