McCain, who sponsored a 2005 immigration bill that proposed to legalize the more than 12 million undocumented immigrants in the country, now takes a much harder line on immigration. He vowed that he would not vote for the bill he co-sponsored three years ago, and emphasizes that his number one priority is to secure U.S. borders.
At the Democratic debate in Austin, Texas, on Feb. 21, 2008, Obama explained why he supported the construction of a border fence.
"There may be areas where it makes sense to have some fencing," he said. "Having the border patrolled, surveillance, deploying effective technology -- that's going to be the better approach."
The Bush administration continues to move forward on the border fence construction that Congress authorized in 2005, despite environmental concerns. Earlier this week, the Supreme Court denied an environmental group's plea to slow down construction of a U.S.-Mexican border fence.
After living on U.S. soil for more than half of his life, Quiñones-Hinojosa believes that a border fence is not the solution to illegal immigration.
"I think it's just a patch, and I think that's not going to be a solution," Quiñones-Hinojosa said of border fences. "As long as there is poverty, as long as there's inequality, people are going to look for better ways to survive. It's human nature."