to get the measure passed. >> the white house believes that before congress leaves town, that the senate will ratify the new s.t.a.r.t. treaty. >> reporter: publicly the white house is expressing optimism that the treaty will get ratified. behind the scenes there is aggressive lobbying. president obama spent a lot of time on monday calling republican senators to try and round up those final votes. rob and vinita? well, because we're all here in north america, we have a front-row seat to a true astrological treat, a full lunar eclipse. it's an extra special one happening in these overnight hours. today is the winter solstice which means the eclipse is taking place particularly high in the sky, as opposed to closer to the horizon. it's got skywatchers all fired up. >> it's a total lunar eclipse which is awesome because you don't get just that partial aspect of it, you actually get the full eclipsing of the moon where the earth's shadow passes over. >> some indirect sunlight is what's giving the moon a