America is not yet an oligarchy, but that's where Charles and David Koch and a few other billionaires are taking us. Around a quarter century ago, as income and wealth began concentrating at the top, the Republican and Democratic parties started to morph into mechanisms for extracting money, mostly from wealthy people. Finally, after the Supreme Court's Citizens United decision in 2010, billionaires began creating their own political mechanisms, separate from the political parties. They now give big money directly to political candidates of their choice, and mount their own media campaigns to sway public opinion toward their own views. So far in the 2014 election cycle, Americans for Prosperity, the Koch brothers' political front group, has aired more than 17,000 broadcast TV commercials, compared with only 2,100 aired by Republican Party groups. Americans for Prosperity has also been outspending top Democratic super PACs in nearly all of the Senate races Republicans are targeting this year. In seven of the nine races, the difference in total spending is at least 2-to-1, and Democratic super PACs have had virtually no air presence in five of the nine states. Four of the top five contributors to 2014 super PACs are now giving money to political operations they themselves created, according to the Center for Responsive Politics. Billionaires squaring off against each other isn't remotely a democracy. When billionaires supplant political parties, candidates are beholden directly to the billionaires. And if and when those candidates win election, the billionaires will be completely in charge.