Here is Kissinger being asked directly: https://youtu.be/p9vj2IkpBEw?t=7
https://www.theguardian.com/us-news/2017/dec/01/michael-flyn...
The Trump team had lots of contact with Russia about all sorts of topics. By the way as far as I know, lobbying the Russians against the interests of the current government is extremely rare and rises to the level of what Reagan did to Carter with the Iran hostage crisis. There’s even laws on the books iirc that this isn’t allowed although no one seems to want to try enforcing it.
"Putin and Kissinger, indeed, met regularly – at least fifteen times. Once Putin was even invited for dinner at Kissinger’s home in New York. A “close and trusting collaboration” seemed in particular be established between the Kremlin and Kissinger Associates, Kissinger’s consulting firm." [0]
[0] "The Strange Putin-Kissinger Friendship", Marcel H. Van Herpen, 2016:
https://www.cicerofoundation.org/wp-content/uploads/Marcel_H...
Connections with the Russian Oligarchy haven't harmed them at all, especially since all their followers are convinced it was a hoax.
Hillary Clinton also spent decades brown nosing Henry Kissinger. I'm curious to see if she releases a public birthday greeting when he turns 100.
[0] https://www.state.gov/dipnote-u-s-department-of-state-offici...
(I drill my law students in spotting and correcting phrasing that can be interpreted in two different ways, i.e., ambiguities.)