It's esp., been true since the early 1970s, when the SC began ruling that campaign money was protected speech, and therefore couldn't be limited or regulated. This was long before their Citizen's United decision, which was more of a final nail in the coffin. It's really interesting to me, that the corporate media will occasionally mention how high our rate of non voting is in elections, compared to other developed democracies. But at the same time, the corporate media never does any studies, research, or analysis of why that is, esp. when it comes to asking registered voters why they don't vote. My take is that those voters see no real diff between the two major parties, esp. on economic issues and policy, and that's why they don't bother voting, esp. in fed elections. But the corporate media doesn't want to admit that, much less let those voters ever know about any third party or independent candidates, that offer a real option for voting outside the duopoly, and someone who isn't bought, because those parties and candidates don't have the money to buy ads in the corporate media, so the corporate media protects their big money clients, the major parties. And so it goes, on and on...