More than 50 percent
As it is, Mr. Bush became the first presidential candidate to win more than 50 percent of the popular vote since his father did so in 1988, and he received a higher percentage of the popular vote than any Democratic candidate since Lyndon B. Johnson in 1964. (From the NY Times, November 4th)
This statistic doesn't prove Bush's popularity. Rather, it speaks to how the 2000 election was dominated by only two candidates. People didn't vote for anyone but Kerry or Bush. Therefore, there's no way Bush could have won the popular vote with anything less than 50%!