If you examine the historical evidence, the common reason given for the electoral college, that the founding fathers feared a demagogue, has scant evidence in its favor save for a little bit of rhetoric here and there while the constitution was being framed. The reason that is far more substantiated and coherent with the rest of the politics of the time is that the electoral college protected the influence of white landowners in states that depended on slavery.
Race in American politics is not some fucking trend. Like really? That's what you're going to go with?
1. https://upload.wikimedia.org/wikipedia/commons/thumb/9/9f/As...
2. http://markettolatinos.com/wp-content/uploads/2011/02/graphi...
Of course it isn't as bad as the raw state to state disparity: 3.6:1 for votes cast in Wyoming vs California. I'm not sure how they got "voter power index" because it seems like Wyoming would obviously have the most voting power.
Either way, that's not really what the article here shows. It assumes everyone of a particular race votes the same and describes the power of a homogeneous voting bloc (which doesn't exist), not the power of individual votes of people of those races.