From "The Analyst":

AMERICA ISN’T CHANGING ITS MIND

Nothing says ‘no’ more clearly than the SecDef Lloyd Austin repeating the same thing America has been saying for weeks.
The Russians have moved their aircraft so you don’t need ATACMS (and by default anything else) supplied by the West to hit their airbases.
And then have your own efforts pushed back at you, ‘because Ukraine clearly has weapons of its own that can reach those targets anyway’. So you don’t need our stuff and the risk of escalation we think comes with it.
There is no way the US is crossing that line this side of an election and I’m not sure it will even after it.
They’re not bothered about Ukraine using anything it makes domestically- that’s their business. But at the moment they are using the ‘over my dead body’ approach to frankly tell the Ukrainians they are fed up with being asked and they won’t change their minds, so let it go.
Zelensky was at the Ramstein meeting in person and it was clearly a message delivered to him to stop embarrassing the administration by asking for what he is never going to get.
The Americans are so intransigent over it I can’t help but wonder if the Russians have actually made it a red line the Americans believe this time.
History will tell us eventually.