It doesn’t look like the US Administration has a clear idea of what to do next on Ukraine. I seriously doubt the three senators in Halifax conference misquoted Rubio who was obviously trying to lay to rest that the Admin repeats Russian talking points.
The origin of the 28 point plan looks more and more murky. It seems to have been a draft from 🇷🇺 that with some obvious 🇺🇸 modification - profits to 🇺🇸, Trump heading some oversight - was taken over by White House 🇺🇸.