Sen. Elizabeth Warren (D-Mass.) has a blunt message for the big Wall Street banks that may withhold campaign donations to Senate Democrats in hopes of quieting her calls to break up the banks. “It will not work,” Warren said in a statement emailed to The Huffington Post.

Warren has been a vocal advocate for reigning in big banks that she says wield too much power in Washington after their recklessness triggered the 2008 financial meltdown.

Citigroup, JPMorgan Chase, Goldman Sachs and Bank of America have discussed ways to soften Warren’s strong tone, Reuters reports, and representatives of some have raised the idea of cutting campaign donations to Democrats. Only Citigroup — a frequent target of Warren’s criticism — so far is publicly withholding money from the Democratic Senatorial Campaign Committee. Cutting donations, Warren said, won’t end her demands.