US president Donald Trump has called on Democrats to move faster on approving his cabinet nominations.
In an early-morning post on his verified Twitter account, Mr Trump said: "When will the Democrats give us our attorney general and rest of cabinet.
"They should be ashamed of themselves! No wonder DC doesn't work."
His choice to succeed Loretta Lynch as attorney general, Alabama senator Jeff Sessions, was due for a vote by the Senate Judiciary Committee.
Several other cabinet picks are due for votes by the respective committees in the next few days.
Mr Trump's comments come the day after he fired the acting attorney general after she publicly questioned the constitutionality of his refugee and immigration ban, and refused to defend it in court.
The Monday-night clash between Mr Trump and Sally Yates, a career prosecutor and Democratic appointee, laid bare the growing discord surrounding an executive order that halted the entire US refugee programme and banned all entries from seven Muslim-majority nations for 90 days.
The firing also served as a warning to other administration officials that Mr Trump is prepared to terminate those who refuse to carry out his orders.
Meanwhile, a shake-up at the Immigration and Customs Enforcement (ICE) agency has resulted in the departure of acting director Daniel Ragsdale.
ICE executive associate director Thomas Homan has been elevated to the role of acting chief.
The agency's Twitter account said Mr Ragsdale is returning to his previous position as deputy director of ICE.
Homeland security secretary John Kelly said in announcing the change that Mr Homan had led efforts "to identify, arrest, detain and remove illegal aliens".
