Greenwire: A Senate bill to implement a national renewable electricity standard should be brought to the floor this session as a stand-alone measure or not at all, a leading co-sponsor of the legislation said today. Sen. Jeff Bingaman (D-N.M.) said the point of introducing the stand-alone RES bill is to get enough co-sponsors to show the bill can pass without amendments. “If we aren’t able to do that, then I think it will make a lot of sense for Senator [Harry] Reid [D-Nev.] not to bring …