"So the poisoning of a Russian double agent in a British cathedral city makes fascinating reading for European nations, but many Western politicians will be guided by bigger strategic choices including relations over Syria, Iran, Ukraine and commerce. Trump has also been reluctant to sanction Putin over alleged interference in the 2016 US election, with most of the running being made by Congress." (The Guardian.)
Does the noun phrase "most of the running being made by Congress" mean doing (by Congress) the most work in regard to sanctioning Putin over alleged interference in the 2016 US election in the paragraph above?
No, that doesn't work. e. Congress is doing most of the work in progressing this investigation).
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No, that doesn't work. It is saying that most of the running is being made by Congress (i.e. Congress is doing most of the work in progressing this investigation). The "with ..." wording is a way of joining this statement grammatically to the first part of the sentence, while suggesting a connection or contrast with it. I wouldn't call "most of the running being made ..." a noun phrase. It a