Arizona Republican Sen. Jeff Flake said those seeking legal status after living in the United States illegally must "pass a background check, make good on any tax liability and pay a fee and a fine." There are other requirements before citizenship can be obtained, he noted.He, too, spoke from personal experience, recalling time he spent as a youth working alongside family members and "undocumented migrant labor, largely from Mexico, who worked harder than we did under conditions much more difficult than we endured." Since then, he said, "I have harbored a feeling of admiration and respect for those who have come to risk life and limb and sacrifice so much to provide a better life for themselves and their families." The bill's opponents were unrelenting, if outnumbered. "We will admit dramatically more people than we ever have in our country's history at a time when unemployment is high and the Congressional Budget Office has told us that average wages will go down for 12 years, that gross national product per capita will decline for 25-plus years, that unemployment will go up," said Sen. Jeff Sessions, R-Ala. "The amnesty will occur, but the enforcement is not going to occur, and the policies for future immigration are not serving the national interest." In the Senate, at least, the developments marked an end to years of gridlock on immigration. The shift began taking shape quickly after the 2012 presidential election, when numerous Republican leaders concluded the party must show a more welcoming face to Hispanic voters who had given Obama more than 70 percent of their support. Even so, division among Republicans was evident as potential 2016 presidential contenders split. Sen. Marco Rubio of Florida was one of the Gang of 8, while Sens. Rand Paul of Kentucky and Ted Cruz of Texas were opposed to the bill.