Comment by mrweasel
That's just not what's happening, at least for some of the countries. Spain is rejecting the F-35 for the EuroFigther (which is the plane they already operate) and Tempest (which doesn't exists yet). So in that case it's not that they are buying jets from competitors, they just aren't buying anything. In this case it feels much more like the Spanish government not really wanting to spend the money, or can't afford it, and Trump is just a convenient scapegoat.
Why would you transact with a country for defense infrastructure that will use force against you whenever they deem it necessary for leverage and power in a transaction? Better to replan and retool for sovereignty even if it means you lack some capability in the near term.