Are you saying the US government been implementing sanctions to make right wing activists not be able to receive bank transfers? That sounds like friendly fire and backwards, are you sure you understood the "source" correctly?
For reference as I hadn't heard about it before:
> Isabelle Jacques, assistant deputy minister of finance, told a committee of MPs that up to 210 bank accounts holding about $7.8 million were frozen under the financial measures contained in the Emergencies Act. - https://www.cbc.ca/news/politics/emergency-bank-measures-fin...