That’s apparently the question that 25% of Democrats, 26% of liberals and 19% of black voters want to ask, since these are the people who think Obama should drop out of the race.  29% of Democrats think Clinton should run as an independent, which may be a good measure of how many ABO Democrats there are. 

One of the things that I often hear when I cite Obama’s weakness with Democratic voters is that there are simply so many more Democratic voters now that 75% of them will be enough in conjunction with support from independents, while McCain is retaining a higher percentage of a smaller pool of voters among Republicans.  Fair enough as far as it goes, but, if these percentages are representative, it also means that the actual numbers of voters who are alienated from Obama are consequently much higher than in previous cycles when there were fewer Democrats.  Losing a quarter of Democrats to the GOP nominee in the past was not desirable, but it is actually much more of a weakness now that a quarter of all Democrats translates into many more votes.