Come on man, you know this is a silly comparison. First, by this time in 2007, Obama was already out-raising Hillary, which Bernie Sanders has not done. Furthermore, you conveniently leave out John Edwards's candidacy by only including that one-on-one matchup, which shows that Hillary's total base of support was smaller in 2007 than it is now. Hillary gets similar levels of support now when faced with an array of opponents rather than just one as is put here.
Not to mention, Obama could appeal to a far larger portion of the Democratic base than Bernie Sanders' narrow sliver.
