The phrase "arrogate power" is correct and usable in written English.
It can be used when discussing the act of claiming or taking power or authority without justification.
Example: "The new regime seemed to arrogate power from the existing government, leading to widespread unrest among the citizens."
Alternatives: "usurp authority" or "claim power".
But in practice they often work at cross-purposes or intrigue as clerical careerists to arrogate power to themselves.
That authority was a check on the power of the Police Department, which, in the words of one former department official, "tends to arrogate power to itself".
Even when a branch does not arrogate power to itself, moreover, the separation of powers doctrine requires that a branch not impair another in the performance of its constitutional duties.
"Baring down on that Whitehall reflex - which is to constantly arrogate powers to itself and tell other areas what to do - is not an overnight job.
"The judges are not elected representatives of the people and they are arrogating power to themselves as if they are the only sanctimonious institution in the country.
The commanders, who installed an interim civilian leader, said they had acted to bring the country back together after millions of Egyptians demonstrated against Mr. Morsi, claiming he had arrogated power, neglected the economy and worsened divisions in society.
This set some animated discussion going: some of the group had noticed the scattered hints that "the Authority" in Philip Pullman's story had arrogated power to himself, or that he was not the actual creator.
One way Mr. Nixon arrogated power to himself was to appoint nonentities to many of the Cabinet positions, ignore the Cabinet as a policy‐making instrument, and run the Federal agencies either from The White House or through agents in the various departments.
This decision is another example of the courts' arrogantly arrogating powers our Founding Fathers never intended them to have.
For Man to arrogate that power, goes this argument, is an act of terrible blasphemy.
In another email, West again objects to the way the department might handle zoning questions, arguing that Martens has no right to decide zoning issues, and for a commissioner to do so would be to "arrogate unauthorized power to himself".
