The presidential response to the Russian incursion into the Ukraine is basically, that there's nothing we can do about it, now. Before the incursion, we had that fine, time-tested strategy of endlessly talking about it. This administration calls that diplomacy. Just keep talking until both sides in conflict come to some sort of agreement, the terms of which are immaterial. For example, we talked and talked with the masters of Iran about our sanctions imposed to impede Iranian nuclear bomb development, until we finally mutually agreed to end the sanction in return for the Iranians continuing to pursue nuclear erasure of Israel. Ain't diplomacy cool?
But as for the Russian armed entry into the Ukraine, like the Islamist armed entry into Begahzi diplomatic offices, we couldn't do anything, so we did nothing -- except to try to minimize the perception that the combination of a basic ineptitude with a big head leads to one bad event after another. But ultimately, as Hillary said, what difference would it make? The one trying to make a difference is the same person with the same character that made the mess more likely in the first place.
So, we can abandon the Ukraine with our sense of self intact, because, basically there's nothing we can do about it, now that we've downsized our military (look it up) because we weren't going to use it anyhow. Our modern diplomacy (see Iran) is, after all, so much less muscle headed.
We used to have nations that were our friends, and we used to have nations whose friendship could be relied upon because it was bought and paid for. Now, what nation feels it could rely on our friendship, or our promises? After all, the Ukraine gave up its atomic bombs in return for our promise that it wouldn't need them because we would protect them from being re-absorbed into the Russian hegemony to come.
But, there's nothing we can do about it.
A question comes to mind. Exactly why is it there's nothing we can do about it, and who is to blame for our current impotence in world affairs?
Hint: the source resides in the halls of government and academia, and in the newsrooms, and is supported by a large number of unelected tools, and under-informed stooges.