President Donald Trump publicly scorned Federal Reserve Chair Jerome Powell on Thursday for the cost of an extensive building renovation as the two officials began a tour of the unfinished project.

Trump said the project cost $3.1 billion, much higher than the Fed’s $2.5 billion figure, while Powell, standing next to him, silently shook his head.

“This came from us?” Powell said, then figuring out that Trump was including the renovation of the Martin Building that was finished five years ago.

“Do you expect any more additional cost overruns?” Trump asked.

“Don’t expect them,” Powell said.

Trump said in his career as a real estate developer he would fire someone for cost overruns. The president joked that he would back off Powell if he lowered interest rates.

This is a developing story. Please check back for updates.