on to control of the Senate? KATHI-ANNE REINSTEIN: They're equally important. I can't say one or the other. I go back and forth in my head to, like which one would I settle for you know, Elizabeth or Barack. Both of them keep me up at night. CRAIG MCMURTRIE: It wasn't so long ago that Republican strategists were quietly confident of a double victory. The presidency and a Senate majority. ELIZABETH WARREN: There we go (laughs). SUPPORTER: Thank you. CRAIG MCMURTRIE: Now the major parties find themselves facing a cliff-hanger with neither side certain how this turns out. Craig McMurtrie, Lateline. Do you have a comment or a story idea? Get in touch with the Lateline team by clicking here .