John Hinderaker at the powerlineblog posted immigration polling data from the Republican Senate staff. You can read the poll results here. According to the top Gallup poll reported by the staff, 60 percent of Americans are dissatisfied with the current immigration system while 33 percent are satisfied. Of those dissatisfied, 39 percent wanted less immigration and 7 percent wanted more, a subgroup wants less immigration is hardly a ringing endorsement of more restrictions.
However, here is another poll question that Gallup has asked periodically since 1965 that shows public opinion becoming more supportive of increasing immigration as the annual number of green cards climbs. The question is: “In your view, should immigration be kept at its present level, increased, or decreased?” Surprisingly, Americans have become more supportive of liberalizing immigration over time. In 1965, only 7 percent of respondents wanted to increase immigration while 24.5 percent did in 2014 (average of two polls in that year).