But in normal years candidates are successful because of the amount of money they can raise. The more they can raise the more brainwashing ads they can buy. The non so secret cabal is the donor class.
Anyone can run? You must meet requirements on age and how long you have lived in the US. You must pay fees and provide signatures for each state. If doing it through a party you have to meet their rules.
Cost to get on most states ballots at a basic level is a million. You could do it for free if you dont want to appear on any ballots.
"In May 2016, MSNBC's Mika Brzezinski accused the DNC of bias against the Sanders campaign and called on Wasserman Schultz to step down. Wasserman Schultz was upset at the negative media coverage of her actions, and she emailed the political director of NBC News, Chuck Todd, that such coverage of her "must stop". Describing the coverage as the "LAST straw", she ordered the DNC's communications director to call MSNBC president Phil Griffin to demand an apology from Brzezinski."
[1] - https://en.wikipedia.org/wiki/2016_Democratic_National_Commi...
Sanders wasn't even a Democrat. He switched solely to run in the primary. It's neither scandalous nor surprising that the DNC would try to put up barriers between him and the nomination.
If the RNC had done it's job, Trump would never have been allowed into the primary in the first place.
Yes, that's exactly why they shouldn't exist.