Heres a good one:
CBS march 2015 (more recent than yours)
“Which of these comes closest to your opinion? Iran’s nuclear program is a threat to the United States that requires military action now. Iran’s nuclear program is a threat that can be contained for now. Iran’s nuclear program is not a threat to the United States at this time.””
Requires military action now – 29%
can be contained for now – 45%
Not a threat at this time – 18%
unsure 7%
This was further broken down by party, though even then not even half of republicans supported military action