I believe there is a two-fold application for the Harlot or Babylon the Great.
You have to remember,...I don't believe that these prophecies have manifested themselves yet in our present day.
Ok, so first it says Mystery, Babylon the Great, the Mother of Harlots and of all the Abominations of the earth. This title is not for literal Babylon; but its spiritual ( mystery ) representation, which is the source ( mother ) of all idolatry ( abominations ) and spiritual adultery ( harlots ).
So you have the spiritual representation because she sits on many waters which are peoples, multitudes, nations, and tongues; that is, she presides over many nations. She has a universal, international character.
Notice the words that are used:
mother, abominations, harlots, woman, fornication, drunk with the blood of the saints.
These are words associated in scripture with a religious entity not a political one. In the Bible, in a spiritual sense, adultery is the worship of another god.
If the USA is the harlot, then who are the "martyrs of Jesus' that she has killed? Who has she fornicated with? What nations is she presiding over? Sure, she is a superpower,...and a major world influence, but is she really presiding over nations? How are the colors purple and scarlet associated with the US?
Also, how is the US riding the Beast (Russia)? We are more powerful than Russia at this moment,...but are we really controlling Russia? The Beast uses the Harlot to his advantage and then discards her. How is Russia using the USA to its advantage?
Now,...I'm not saying that Roman Catholicism is the Great Harlot,...but lets look at her example in history. In the middle ages she dominated kings and nations and moved political powers to her liking. This example just shows that this is a possibility of how a religious entity can ride a political entity and in doing so,...commit fornication.
Ok, the second application,...is that she needs a headquarters or a city. "And that woman who you saw is that great city that reigns over the kings of the earth."
How do you reconcile that the USA is not a city?
From scripture it looks like not only will Babylon the Great be an entity of power over the nations but she will also reside or have her headquarters in a city. This city will be the focal point of false religion and international wealth and commerce. I don't believe this city is in existence yet.
Start with the fact that all those who have ships at sea have become rich due to her shameless luxury. This particular entity - referred to as Babylon the Great is responsibile for the extra wealth that the world traders enjoy.
I'll repeat,...because the point was made very clear in my last posts,...the city/ religious entity is not in existence yet. What you state above can't happen at this point yet because it doesn't exist. We can see the world moving in this direction (for the spirit of the antichrist is already here),...but it's not in fulfillment.
Why?
12 "The ten horns you saw are ten kings who have not yet received a kingdom, but who for one hour will receive authority as kings along with the beast. 13 They have one purpose and will give their power and authority to the beast.
Ok, so we don't have ten kings who have given their power to the Beast yet. These powers are not in existence yet. If the beast is in existence (like you say it is),...then that means the 10 kings have to be in existence too,...so in your scenario,...who are the ten kings?
And remember,...the woman is riding this beast. So where is the woman,...again,...she's not in complete fulfillment yet either.
The city of Babylon the Great will be chosen by the antichrist for his capital and will be either built or rebuilt at a tremendous expense, as they put it up in a hurry. There are indications that this city will be built quite rapidly. That craftsmen from all over the world will be paid premium wages and thousands will descend upon this area with unlimited funds to build this awesome wonderful city that shall be the center of world banking and world commerce. We are told in the book of Daniel that when the antichrist establishes his reign that the craftsmen will prosper in his reign.