Sen. Elizabeth Warren (D-MA) “launched a surprise attack Tuesday against Washington’s most revered Democratic-leaning think tanks — and drew blood,” the Washington Post reports.

“Warren, stepping up her crusade against the power of wealthy interests, accused a Brookings Institution scholar of writing a research paper to benefit his corporate patrons. Warren’s charge prompted a swift response, with Brookings seeking and receiving the resignation of the economist, Robert Litan, whose report criticized a Warren-backed consumer protection rule targeting the financial services industry.”