A few weeks ago, two Democratic Party officials toured K Street shops to explain how lobbyists can donate to the 2020 Democratic Party convention in Milwaukee. Politico obtained documents showing that, for example, $300,000 gets you VIP credentials and glitzy skyboxes towering above the convention floor.

In 2016, seventeen donors ponied up three-quarters of the Democratic National Convention’s funding, with many corporate sponsors (including Facebook, Bank of America, and Comcast) donating over $1 million apiece. More than a few of those donors also shelled out for the Republican National Convention, sending a clear message: whoever wins, we expect our interests to be represented going forward. Otherwise, you can kiss our money goodbye.

Today, Bernie Sanders threw down the gauntlet on corporate sponsorship of the convention. He released a multipoint plan to get corporate money out of politics. Its very first stipulation: “As the Democratic nominee, Bernie will ban corporate contributions to the Democratic Party Convention and all related committees.”