Elizabeth Warren and Janet Yellen met for private lunch in December

Sen. Elizabeth Warren (D-Mass.) met with Federal Reserve Chair Janet Yellen on Dec. 2 for lunch, Warren’s office told The Hill.

A Warren representative declined to describe what was discussed at the meeting between Yellen and Warren, who frequently criticizes Wall Street.

The meeting came at the height of progressives’ opposition to President Obama’s nomination of Antonio Weiss, an investment banker, for the No. 3 spot at the Treasury Department. 

{mosads}Warren helped lead a successful effort amongst progressives to derail the Weiss nomination, arguing that he was too close to Wall Street.

The New York Times reported on Tuesday that Warren also met privately in December with former Secretary of State Hillary Clinton at Clinton’s Washington, D.C., residence. Clinton is the 2016 Democratic front-runner, assuming she runs for president. Warren has said she is not running.

The Warren-Yellen meeting also came as Warren sought to rally liberals in opposition to a provision included in a $1.1 trillion government funding bill, which was dubbed the “cromnibus.” She ended up opposing the cromnibus.

Warren and other progressives argued that the provision would no longer require big banks to separate trade in financial derivatives from traditional bank accounts, a development she said could lead to another 2008-style financial meltdown. Champions of the bill argued that it would loosen regulatory red tape and boost economic growth.

Yellen is scheduled to testify before the Senate Banking Committee, of which Warren is a member, on Feb. 24.

This story was updated at 3:33 p.m.