The scenes in O'Hare last night were completely insane and the policy, beyond stupid. "Too stupid to be true" does not seem to be a valid rubric for this administration.
Some stupid and insane stories about him are certainly false, but many of them appear to be true.
It fits with everything we know about Trump, especially his xenophobic politics.
Worse, given his tendencies to punish his perceived political enemies, if such a vaccine were available before November 2020, it is very likely he would have restricted the drug to his supporters (i.e., political officials, donors, and Red states) in a blatant attempt to control the outcome of the election.