Maybe he knows warmist Holdren would advise rejection.
At a House hearing today, Holdren said:
I can tell you that this has not been a major focus of my activity and I have not in fact had any conversations with the President at this point about the Keystone pipeline. He might in the future ask me about scientific aspects of it, but that has not happened.
Perhaps, Obama is smarter than I thought. He might realize that Holdren is incompetent and so does not wish to hear from him on this subject.