[Fedora]

I think Clinton was active with the British antiwar movement in the 1968/1969 timeframe, IIRC. There were quite a few antiwar people who made trips to Moscow (often entering via Scandinavia) during this period.

[AmeriBrit]

All I have is my memory to go on and recollection of what I read in the local Oxford newspaper at the time, and that was that when he was expelled and ordered to leave the country he was whisked off to Moscow at the invitation and expense of the KGB.