Democracy or oligarchy

See Senator's recent speech on the topic. From the Introduction:

"We are at a pivotal moment in American history. The major issue of our time is whether the United States of America retains its democratic foundation or whether we devolve into an oligarchic form of society where a handful of billionaires have almost absolute control over the political and economic life of the nation. Tragically, we are headed on a perilous path toward the latter. When large corporations and a few wealthy families can spend unlimited sums of money to buy and sell politicians, it is now clear to most Americans democracy is under severe attack."