Grassley suggested he’ll try to chip away at the amount of discretion the proposed legislation would give to the Homeland Security Department, an issue several Republicans raised during the hearings. “I don’t have any specific amendment in mind right now. I have a generic amendment in mind,” he said. “We should legislate and not delegate. And that’s a lesson we should have learned before Obamacare.”…

Public outcry against the 2007 immigration bill contributed to its demise, but opponents of the Gang of Eight’s legislation have been slower to mobilize voters. Unlike the National Rifle Association and its campaign against gun control, there is no single, major lobbying force working against immigration reform.

The Gang of Eight has also played aggressive defense with its bill, rushing to quash what they see as misinterpretations about the legislation and to address issues that could scuttle it. Former Republican Sen. Jon Kyl, who worked on the issue during the last fight, said Sen. Marco Rubio, R-Fla., did a better job of laying the groundwork for the bill than Republicans have in the past. Rubio has also reached out to all of his Republican colleagues for one-on-one meetings and solicited ideas to improve the bill.