There were 5 sponsors. Leahy, Obama, Coburn, Clinton, Webb.
The link doesn't work. And I don't recall and don't have ready access to know whether S.Res.511 ultimately became the "sense of the Senate" resolution that was adopted or was the bill that was introduced to amend Sec. 1401.
Clare McKaskill of Missouri was one of the sponsers of both and you don't list her at all.