Comparing the
electoral votes Gore won in 2000, with the
electoral map distribution in 2004, after the 2000 census, shows that Gore states lost 7 electoral votes in the process (meaning that Bush-won states gained 7). Just adding New Hampshire or West Virginia won't do it anymore.
Change in Gore-won states from 2000 to 2004:
California +1
Connecticut -1
Illinois -1
Michigan -1
New York -2
Pennsylvania -2
Wisconsin -1
Total change = -7