Honeywell sourced some metal for the F-35 from China and historically the US government's had to do some political gymnastics to source titanium for military use from Russia, beyond that I don't know. Presumably the implication is that USAF is getting steel from Russia as well. To take the innuendo a bit further if the USAF does it surely it must be okay for Tesla Musk to do it too. Of course, that argument conveniently omits that Tesla Musk, after paling around with Putin, is publicly encouraging American allies (Taiwan, Ukraine) to surrender sovereign land to American adversaries.

Whether or not Russian aluminum is sanctioned is largely irrelevant to the problem of Mister Musk inserting himself into major geopolitical events while the pro-Putin gang demands that Elon's critics rid themselves of these horrible political tones.