I have seen a lot of know-it-all democrat voters posting in the last few days about how Trump's economic strategy is bound to fail and those who voted for him for economic reasons are fools. Obviously I am extremely sceptical of these people, as economic literacy has never been a strong point of progressives (not to mention how they are all suddenly experts, like how they were for virus propagation, climate change, etc.).

Nonetheless, I myself am no economist. Can somebody with a better understanding explain the strategy to me, and also any potential ways in which it COULD backfire in the way progressives are suggesting?