yeah I see the rationale for it being that they were developing a new mask type that would be comfortable and reusable that they could stock up on. they didn't think that the entire global infrastructure would be so overwhelmed that they couldn't procure them in time. turns out they should have known to keep a reserve of them(100m was the number they would have stocked, though 300m is needed for this particular pandemic) now obama's team didn't hoard enough indeed and he deserves a bit of blame but it's also 3 years into trump's term... at a certain point you do need to accept responsibility for your failings and not reupping that supply is a failing.