Recently someone crunched the numbers and claimed that if voter turnouts in 2012 had mirrored 2004 in terms of ethnicity, Romney would have won the election by a slight margin. However, because black voters turned out in record numbers for the second time, and voted overwhelmingly in favor of Obama, he won. So, there is no way Hilary is the Democratic candidate in 2016, right? She can't carry the black vote. And if they can't run some sort of immigration reform that allows illegal aliens to vote AND manage to get them to, that rules out a hispanic candidate (incidentally, some Republicans seem to want this too, thinking Rubio could win the hispanic vote for them). So, when will the left trot out their next black candidate? They have to, right? This President isn't going to get any better over the next few years, so clearly they are going to have to but those votes again.
This all assumes, of course, that there isn't a push to do away with term limits between now and then.