Attorney generals from across the country filed a brief on Friday to challenge President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE's appointment of White House budget chief Mick Mulvaney Mick MulvaneyMick Mulvaney to start hedge fund Fauci says positive White House task force reports don't always match what he hears on the ground Bottom line MORE to lead the Consumer Financial Protection Bureau (CFPB) as its acting director.

18 AGs are filing a brief to challenge @POTUS’s appointment of Mick Mulvaney as @CFPB Acting Director. pic.twitter.com/P4iGDdzlkR — Eric Schneiderman (@AGSchneiderman) December 8, 2017

Seventeen states and Washington, D.C., filed the motion.

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Former CFPB Director Richard Cordray promoted Leandra English to the deputy director position shortly before he stepped down. The CFPB succession rules established by the Dodd-Frank Act state that the deputy director becomes interim leader if the director resigns.

However, Trump promoted Mulvaney — a vocal critic of the agency — to lead the CFPB. The White House argued that the president has the power to supersede Dodd-Frank’s line of succession through the Federal Vacancies Reform Act.

English asked a federal court on Wednesday to block a previous ruling that cleared the way for Trump to appoint Mulvaney.

The complaint filed by English requests that the court impose her restraining order against Mulvaney, although it dismissed her effort two weeks ago.

English argues that Mulvaney cannot run the CFPB because of the line of succession established in Dodd-Frank. English also claims Mulvaney’s appointment violates the Federal Reserve’s independence because the CFPB was created within the Fed system and Mulvaney is a senior White House aide.