America has an oligarchy of its own
Oligarch came into common use after the fall of the old Soviet Union to describe those that had come to economic and political power in Russia. It is generally not used as a complimentary description of those in control or power.
Heretofore, I have referred to these people in America as the elite corrupt ruling class, corrupt socialist Democrats, corrupt RINOs, corrupt minions, and all the corrupt variations.
Sadly, after coming to understand these terms, it is pretty clear that America has an oligarchy of its own. American oligarchs are comprised of the high visibility Marxists in the U.S. House of Representatives and Senate, a very high number of the other members of both houses of congress (Democrats, Republicans, and Socialist), the Biden administration, the owners and CEOs of conventional media, the high tech industry, the social media industry, the financial industry, the medical industry, the Deep State bureaucracy, the entertainment industry, and the list goes on. There is no need to publish names, for you already know who they are.
In each of the quotations below, you can see where one or more of the oligarchs have infringed on the lives of liberty loving Americans.
"The accumulation of all powers, legislative, executive, and judiciary, in the same hands, whether of one, a few, or many, and whether hereditary, self-appointed, or elective, may justly be pronounced the very definition of tyranny." ~ James Madison