I guess you talk about Russia as dubious backer.

You really believe that the POTUS (notably Jill Stein and the Green Party) could be paid by Russia to enforce Russian policies to the detriment of US citizens ?

This idea is as crazy as the idea that China invented global warming to harm the USA economy.

From https://www.rte.ie/news/analysis-and-comment/2018/0111/93244...

Back in 2012, almost three years before he declared that he was going to run for the White House, Mr Trump tweeted: "The concept of global warming was created by and for the Chinese in order to make U.S. manufacturing non-competitive."