Since Obama would still have been president, one presumes that these two Americans discussing foreign policy with Ukrainian soldiers were reflecting official US policy:

From 2016 when Graham & McCain visited #Ukraine to discuss providing logistics for an all out war with #Russia
@EvaKBartlett @VanessaBeeley @_whitneywebb @DeanoBeano1
As usual, while Americans may have paid little attention, the Russians certainly would have. This kind of talk isn’t cheap and isn’t without consequences. Who’s to blame? Unless Lindsey! is officially rebuked by the Zhou administration for his latest antics—re assassination of a foreign leader—what incentive does Putin have to seek compromise with the US?
'This is an exceptionally bad idea,' Ted Cruz said.
Last night Lindsey Graham repeated his call for the assassination of Putin on FOX News. The tweet is still up.
Evidently, calling for the murder of a foreign leader is allowed on Twitter but challenging COVID dogma will get you banned?
Laura Ingraham called Lindsey’s remarks “really stupid and dangerous” and “a stupid comment” on her show last night.