Clinton's strategy isn't just about winning over the progressive base. It's about energizing the electorate. If all the people who recognize themselves in this video -- the young, the poor, minorities, single women -- actually get excited and turn out to vote (as they did not do in the mid-term elections of 2010 and 2014), Clinton wins. But the devil will be in the details. Clinton cannot sustain this sort of aspirational politics in the more than 18 months between now and November 2015 without getting very specific. In many ways, the most interesting political contest to come is not the battle for the nomination or even the likely campaign between Clinton and her Republican rivals. No, the contest to watch is the fight between the campaign Clinton needs to wage and the one that will be acceptable to her Wall Street sponsors.