March 08, 2019 "Information Clearing House" -  It will fun to watch this developing:

Trump Seeks Huge Premium From Allies Hosting U.S. Troops

Under White House direction, the administration is drawing up demands that Germany, Japan and eventually any other country hosting U.S. troops pay the full price of American soldiers deployed on their soil -- plus 50 percent or more for the privilege of hosting them, according to a dozen administration officials and people briefed on the matter.
...
Current and former administration officials briefed on the idea, who asked not to be identified discussing the program, describe it as far more advanced than is publicly known. As well as seeking more money, the administration wants to use it as a way to exert leverage on countries to do what the U.S. demands overseas.

As evidence, they say officials at the Pentagon have been asked to calculate two formulas: One would determine how much money countries such as Germany ought to be asked to pay. The second would determine the discount those countries would get if their policies align closely with the U.S.

The extortion scheme Trump wants to use against 'allies' is a perfect own goal.