For whom was the phrase "useful idiot" originally used?

The phrase “useful idiot” is a disparaging term for a person perceived as propagandising for a cause without fully comprehending the cause's goals, and who is cynically used by the cause's leaders. The persons in all four answer options have been labelled with this tag. The convicted sex offender Jeffrey Epstein referred to Prince Andrew as his useful idiot; Alexander Vindman, former US Army lieutenant colonel and Director for European Affairs for the US National Security Council, referred to Donald J. Trump as Vladimir Putin’s useful idiot; Chinese scientists have been called “Beijing’s useful idiots” over China’s Covid-19 policy. However, the term was originally used during the Cold War to describe non-communists regarded as susceptible to communist propaganda and manipulation.

The invention of the phrase “useful idiot” has often been attributed to Vladimir Lenin. For example, in 1959, Congressman Ed Derwinski of Illinois entered an editorial by the Chicago "Daily Calumet" into the Congressional record, referring to Americans who travelled to the Soviet Union to promote peace as "what Lenin calls useful idiots in the Communist game". However, there is no record of his ever having used the term in any of his works archived at the US Library of Congress. Similarly, the Oxford English Dictionary in defining “useful idiot” says: "The phrase does not seem to reflect any expression used within the Soviet Union."