Wall Street is showing some concern Monday after tensions ramped to a much higher degree between the White House and the Federal Reserve, two Washington institutions whose independence investors used to take for granted.

Powell said Sunday that the Justice Department served the central bank with subpoenas and threatened a criminal indictment over his testimony last year about a building renovation. The move was met with sharp criticism from both Democrats and Republicans, many arguing that the Fed should remain independent.

White House officials are heaping blame on DC US Attorney Jeanine Pirro over her office’s criminal investigation into Fed Chair Jerome Powell, faulting her for blindsiding them with an inquiry that has forced the administration into a dayslong damage control campaign,

White House economic adviser Kevin Hassett said on Monday he was not involved in conversations with the Justice Department about its probe into Federal Reserve Chair Jerome Powell and did not know whether President Donald Trump had approved it.

Powell was responding to grand jury subpoenas delivered to the Federal Reserve related to his congressional testimony regarding construction work at the Fed headquarters.