If confirmed by the Senate, she will assume a Cabinet-rank position as head of the White House agency that assists the president on budget matters.

CNN: STORY HIGHLIGHTS

The Essex branch of the Police Federation welcomed the appointment but said it was concerned senior officers were getting allowances - such as a flat rate 15% of salary for being in a senior position - while rank and file officers had seen competency payments stopped.

BBC: Essex Police top officer bonus pay review called for

The title "emeritus" is used when a person of status, such as a professor or bishop, hands over their position so their former rank can be retained in their title.

BBC: Benedict XVI to be known as 'pope emeritus'