Current and former candidates for the 2020 Democratic presidential nomination lashed out at the Democratic National Committee for changing debate qualification rules that would give Michael Bloomberg an opening to make the stage.

“The DNC didn’t change the rules to ensure good, diverse candidates could remain on the debate stage. They shouldn’t change the rules to let a billionaire on. Billionaires shouldn’t be allowed to play by different rules — on the debate stage, in our democracy, or in our government,” Massachuetts Sen. Elizabeth Warren said in a tweet on Friday.