Samizdata
has an interesting note: "Not only is Kerry the ’60s candidate, but he also apparently employed a campaign strategy that would have given the election in the ’60s. If Kerry had won the same bundle of states that gave him 252 electoral votes in this election, but the states were still valued according to the Congressional apportionment based on the Census of 1960, he would have won the election, 270 electoral votes to 268. The trend since then:

1960 census (1964, 68 elections) - Kerry 270, Bush 268 1970 census (1972, 76, 80 elections) - Kerry 270, Bush 268 1980 census (1984, 88 elections) - Bush 276, Kerry 262 1990 census (1992, 96, 2000 elections) - Bush 279, Kerry 259 2000 census (2004, 08 elections) - Bush 286, Kerry 252

This is indicative of a potential long-term problem for the Democrats: they are strongest in the parts of the country that aren’t growing anymore. Even since the 2000 election (which was still based on the 1990 Census) the states Kerry won this time around are worth seven fewer electoral votes than they were worth last time." He takes his figures from here
(PDF file). (Thanks to Wretchard).