Bush won that presidential election by three percentage points, 51%-48%.
Here were the NBC/WSJ trial heats from March 2004 (when Kerry pretty much locked up the nomination) to late October 2004:
March (Mar.6-8): Bush 46%, Kerry 43%, Nader 5%
May (May 1-3): Bush 46%, Kerry 42%, Nader 5%
June (June 25-28): Bush 45%, Kerry 44%, Nader 4%
July (July 19-21): Bush 47%, Kerry 45%, Nader 2%
August (Aug.23-25): Bush 47%, Kerry 45%, Nader 3%
September (Sept.17-19): Bush 48%, Kerry 45%, Nader 2%
Mid October (Oct.16-18): Bush 48%, Kerry 46%, Nader 2%
Late October (Oct.29-31): Bush 48%, Kerry 47%, Nader 1%