Ada dua bagian: pelaksana (kekuasaan) + kekuasaan pemerintahan

'pelaksana kekuasaan)' semakna dengan 'pemegang kekuasaan atau lazim dipadankan dengan holder of power/power holder
Contoh:
The incumbent is the existing holder of a political office who normally has a structural advantage over challengers during an election for multiple reasons.
Source: Boundless. “The Power of Incumbency.” Boundless Political Science. Boundless, 02 Jul. 2014. Retrieved 14 Feb. 2015 from https://www.boundless.com/political-science/textbooks/boundl...

Also called "Positional power," it is the power of an individual because of the relative position and duties of the holder of the position within an organization. ...
http://en.wikipedia.org/wiki/Power_(social_and_political)

The decisions made by political leaders influence a large group of people, leading politicians to be a category of power holder that has the potential of being ...
https://books.google.co.nz/books?id=nRlvAwAAQBAJ&pg=PA4&lpg=...

The overthrow of a government can, therefore, be achieved by action on four distinct levels: the executive power holder, ...
https://books.google.co.nz/books?id=I_6oAwAAQBAJ&pg=PA25&lpg...

Second, the government and the opposition will agree to a time on a debate in ... designation of the executive power-holder, political control over the conduct of ...
https://books.google.co.nz/books?id=tVIooDXXbSQC&pg=PA220&lp...

The chief executive may be selected by the legislature, as in the case of the United ... of this control are as follows: ~ Designation of the executive power-holder. ...
https://books.google.co.nz/books?id=yTAkDMtho0sC&pg=PA84&lpg...

Sekali dayung, dua istilah tercakup. Contoh-contoh di atas juga menunjukkan dengan jelas bahwa 'executive power digunakan untuk merujuk kekuasaan pemerintahan. Contoh penggunaan lainnya:
THE EXECUTIVE POWER (UUD 1945)
Article 4
(1) The President of the Republic of Indonesia shall hold the power of government in accordance with the Constitution.
(2) In exercising his/her duties, the President shall be assisted by a Vice- President.
http://www.helplinelaw.com/law/indonesia/constitution/consti...

Indonesia adopts democracy, which means that sovereignty is vested in the people and implemented pursuant to a rule of law. The basic rule of law is represented in the Indonesian constitution, i.e., the Principle Laws of 1945 (“1945 Constitution”). ... These functions, although not strictly so, are generally ascribed to executive, legislative, and judicative power which suggested the adoption by Indonesia of trias politica. The executive power is held by the President and Vice President which are elected directly by the people in a general election every five years.
http://www.nyulawglobal.org/globalex/Indonesia.htm

Boston College law professor George Brown said Mr. Holder's legacy will be the legal continuation of a "broad, presidential authority to deal with what is essentially a wartime situation…at a time when the president's legal advisers supported and justified his extraordinary assertion of executive power.''
http://www.wsj.com/articles/u-s-attorney-general-eric-holder...

The politics of Croatia are defined by a parliamentary, representative democratic republic framework, where the Prime Minister of Croatia is the head of government in a multi-party system. Executive power is exercised by the government and the President of Croatia. ...
http://en.wikipedia.org/wiki/Politics_of_Croatia

Eric Holder: Obama’s Use of Executive Power Has Been Limited
http://time.com/3070955/eric-holder-executive-power-terroris...

Cukup jelas juga bahwa executive power hampir selalu digunakan dalam konteks bidang politik dan sudah mencakup makna pemerintahan. Maka, penyisipan government opsional saja: boleh digunakan untuk menegaskan, silakan ditanggalkan jika meyakini konteks penggunaan sudah membantu interpretasi.