Bush says immigrants fill gap in labor market - Article Photos 1/6

Former President George W. Bush gives opening remarks at the Federal Reserve Bank of Dallas for a conference titled "Immigration and 4% Growth: How Immigrants grow the U.S. Economy," Tuesday, Dec. 4, 2012, in Dallas. The George W. Bush Institute is hosting panel discussions highlighting the positive impact of immigration on U.S. economic growth. (AP Photo/LM Otero)