The firebrand progressive Elizabeth Warren, a Senator from Massachusetts, went on the offensive against the Supreme Court at a labor convention Sunday. Warren told attendees at the AFL-CIO convention that the Supreme Court was too close to big business and warned of a “corporate capture of the federal courts,” Politico reported.

“You follow this pro-corporate trend to its logical conclusion, and sooner or later you’ll end up with a Supreme Court that functions as a wholly owned subsidiary of Big Business,” said Warren.

The Massachusetts Senator also lashed out at big banks for lobbying against more regulation. “The big banks and their army of lobbyists have fought every step of the way to delay, water down, block or strike down regulations,” she said.

AFL-CIO head Richard Trumka sounded a similar note at the convention. The Supreme Court, said Trumka, is “the best champion of corporate America.” The labor leader added that it “may take a constitutional amendment, because this Supreme Court, as currently constituted, equates money with free speech.”