theguardian.com/uk-news/2017/a…
law.cornell.edu/uscode/text/50…
"an entity that is openly acknowledged by a foreign government or governments to be directed and controlled by such foreign government or governments."
"Britain’s spy agencies played a crucial role in alerting their counterparts in Washington to contacts between members of Donald Trump’s campaign team and Russian intelligence operatives."
Here is the definition of "Foreign Power" in the statutes:
law.cornell.edu/uscode/text/50…