Update: Nelson, Landrieu and Lincoln join Murkowski's EPA plan

Earlier Thursday I noted that Sen. Blanche Lincoln (D-Ark.) is backing Sen. Lisa Murkowski's (R-Alaska) proposal to block planned EPA regulation of greenhouse gas emissions. Murkowski just said on the Senate floor that Ben Nelson (D-Neb.) and Mary Landrieu (D-La.) are the other Democratic co-sponsors, along with 35 Republicans.