FILE - In this Tuesday, June 15, 2010 file photo, immigration reform advocates march around the Federal Courthouse in downtown Denver. The group, which had more than 100 protesters, mar

 

              FILE - In this Tuesday, June 15, 2010 file photo, immigration reform advocates march around the Federal Courthouse in downtown Denver. The group, which had more than 100 protesters, mar
FILE - In this Tuesday, June 15, 2010 file photo, immigration reform advocates march around the Federal Courthouse in downtown Denver. The group, which had more than 100 protesters, marched from the Colorado state Capitol to the federal courts to call for changes in the nation's immigration laws. Colorado's results for the 2012 presidential election will undoubtedly turn, in part, on Hispanics, who account for about 20 percent of the population in the state, and have, so far, overwhelmingly favored the president. Immigration actually ranks third in importance in polling of Hispanics, with the economy and education rating No. 1 and No. 2, says Floyd Ciruli, a Denver pollster. But, he says, "it's almost a litmus test issue - do you have at least sympathy and understand the issues we're dealing with?" (AP Photo/David Zalubowski)