Richard Cordray, the former head of the Consumer Financial Protection Bureau, and a close ally to Sen. Elizabeth Warren (D-Mass.), threw his support to Joe Biden on Saturday, saying he thinks the former vice president is the best choice to beat President Trump and bring the country together.

“I know that he was very aligned and very supportive in our work to protect the middle class,” Cordray told The Washington Post. Cordray said that during his time in public service, including at the CFPB, he worked with Biden on issues including student loan debt and home mortgages.

Cordray also said he thinks Biden is “uniquely positioned” to be the leader “who can help unify this country again at a time when it’s deeply divided.”

Though Cordray ran for governor in Ohio, he is hardly a household name. But his nod may send a signal about where Warren’s circle — and perhaps where Warren — will land when deciding whether to back Biden or his liberal rival Sen. Bernie Sanders (I-Vt.)

In an interview, Cordray cautioned against reading too much into his endorsement. He said that he did not speak with Warren about his plan to endorse Biden, and he made clear that he is not trying to speak for her or her supporters.

Cordray was selected to run the CFBP after the Obama administration decided it would be too difficult to get Warren through the confirmation process to run the agency, which she proposed, helped push through Congress and then helped set up.

Instead, Warren ran for the U.S. Senate in Massachusetts and defeated incumbent Republican Sen. Scott Brown.

Cordray said Biden swore him in as the director of the CFPB. Before leading the CFPB, Corday was Ohio’s attorney general and worked with the late Beau Biden, who served as Delaware’s attorney general. Beau — Biden’s eldest son — died of brain cancer in May 2015.