Not only can you, they have. RealClearPolitics, a fairly unbiased and widely respected source has listed six ways of counting the popular vote:
http://www.realclearpolitics.com/epolls/2008/president/democratic_vote_count.html
Popular Vote Total 14,418,691 49.2% 13,917,393 47.5% Obama +501,298 +1.7%
Estimate w/IA, NV, ME, WA* 14,752,775 49.3% 14,141,255 47.2% Obama +611,520 +2.1%
Popular Vote (w/FL) 14,994,905 48.3% 14,788,379 47.6% Obama +206,526 +0.7%
Estimate w/IA, NV, ME, WA* 15,328,989 48.4% 15,012,241 47.4% Obama +316,748 +1.0%
Popular Vote (w/FL & MI)** 14,994,905 47.4% 15,116,688 47.8% Clinton +121,783 +0.4%
Estimate w/IA, NV, ME, WA* 15,328,989 47.5% 15,340,550 47.5% Clinton +11,561 +0.03%
In two of the six, Hilary comes out ahead.
Note that I make no such claim- I consider the popular vote a virtual tie.