WASHINGTON Sen. Elizabeth Warren (D-Mass.) on Tuesday rallied progressive activists against President Donald Trump s appointment for interim head of the Consumer Financial Protection Bureau.

Warren, Sen. Jeff Merkley (D-Ore.) and leaders of major liberal groups, including the Progressive Change Campaign Committee, MoveON and Demos, rallied outside the consumer agencys headquarters in downtown Washington, D.C., as CFPB employees congregated at their office windows to watch.

For six years, this agency has fought to give consumers a chance. For six years, this agency has fought for working people, Warren declared as demonstrators cheered behind her. And now its time for us to fight for the agency.

Trump on Friday appointed White House budget director Mick Mulvaney to serve as interim CFPB director, and Mulvaney showed up at the agency on Monday. But last week, outgoing CFPB director Richard Cordray named deputy director Leandra English as the interim agency head. English has sued to lead the watchdog.

Warren is credited with conceiving the CFPB. She and other boosters of the agency argue that the 2010 Dodd-Frank Wall Street reform law that created the CFPB insulates it from a presidential appointment of an interim head like Mulvaney. They maintain that English can hold the post until Trump nominates a permanent leader who is confirmed by the Senate.

This is about Wall Street banks versus families, and right now Donald Trump has put himself firmly on the side of Wall Street banks, Warren told reporters after delivering her prepared remarks. Its like a double kiss to Wall Street this week trying to push forward tax reform that gives a trillion and a half dollars in tax cuts to giant corporations and at the same time, trying to hollow out the Consumer Financial Protection Bureau.

I say we start by following the law, she added. If Donald Trump wants to name a nominee, name him and bring him over to the Senate for the hearing.