Source (last paragraph)
*Here’s another fact few Americans know: ever since 1918, the Russians have never once broken any treaty they’ve signed with the U.S., though the U.S. has broken a number of the treaties it’s signed with the USSR/Russia.
Is this actually true? I can't think of any examples. I know there were some US-USSR/Russia treaties such as Open Skies and the INF treaty that the US withdrew from, but withdrawing from a treaty should be different from breaking the treaty, since I would expect these treaties to have an exit clause.