when i made that statement years ago. we did not have the kind of energy profile we have. we did not have the full understanding of how the particular oil that would have been extracted from those tar sands was of a different degree of dirtiness and polluting in terms of greenhouse gases. so i'm not going to sit here and tell people that i make up my mind -- that's the republicans. they make up their mind, they're never bothered by evidence. >> but bernie sanders has been where you are on these issues. bernie sanders was there when it came to marriage 20 years ago. do you think one of the reasons he's doing well right now is some progressives think, well, you know what? he was there when it wasn't popular. >> well he can speak for himself and i respect his views. i can just tell you that i am not someone who stakes out a position and holds it regardless of the evidence or regardless of the way that i perceive what's happening in the world around me.