Albeit, not explicitly mentioning SOPA, the National Governors Association sent a letter last December inviting legislators to introduce measures to fight Internet copyright infringement.
Governors Jay Nixon (D) of Missouri and Sam Brownback (R) of Kansas wrote that "Criminals have turned to the Internet, abusing its virtually unlimited distribution opportunities to expand their illicit activities and profits," The Hill reports. "Some rogue sites dupe Internet users into thinking they are legitimate, accepting major credit cards as forms of payment and featuring advertising from blue chip U.S. companies."