George W. Bush won 91% of the Republican vote. He was more popular among Republicans than any Republican since Eisenhower.
Republican (37% of electorate)
93% of Republicans voted for Bush
+2% from 2000
http://www.cnn.com/ELECTION/2004/pages/results/states/US/P/00/epolls.0.html
President Bush received more votes in 45 states than he did in 2000.