Four in 10 of those surveyed say they “don’t know” when it comes to their opinion of the immigration bill before the Senate, while 33% say they favor the bill and 28% oppose it.

The lack of opinion and indifference remains fairly consistent throughout other issues the bill may affect, such as if it will help or hurt the U.S. economy, or make the U.S. more or less safe from terrorism. The majority in both cases believe the bill will “not make much of a difference.”

The Pew survey, a self-proclaimed “independent fact tank,” was conducted the last week of April, two weeks after the Boston marathon bombing. When it was discovered the suspected bombers were immigrants, it became a contentious issue for some Republicans who called for a possible delay on the bill.

But for those surveyed, many do not think the bombings should be a factor in the debate for immigration reform, 58% called the two “separate issues.”