Plus Midwestern farming communities that are seeing increased bankruptcies as they get caught between higher tariffs on steel and equipment driving up costs and retaliation for trade policies shrinking their market.
This is a fascinating (morbidly speaking) demographic right now. Farmers are deeply emotionally & financially invested in believing Trump is 1) a competent negotiator and 2) doing what is best for the country. As long as they can couch their own misfortunes as a sacrifice for the Greater Good, their misfortunes will feel justified and they will continue to support Trump despite the personal cost.
So it's not really a matter of how much suffering can they endure, but rather how long can they continue to deny reality and believe in the illusions that give their sacrifices meaning and purpose. The longer this goes on, the greater the stress of their cognitive dissonance. The deeper in trouble they fall, the greater need to believe Trump is nigh unto God and they are his warriors.
We had a similar dilemma with the Vietnam War and the Iraq War. At what point do you cave to the knowledge that all that killing was for nothing? If you lost a son, a daughter, a brother or sister, in any of those wars, the loss is at least somewhat mitigated by knowing they were "defending the U.S.A." If you believe that we were protecting the oil industry and the investments of the Carlyle Group, there is no counterbalance for despair and grief.
If the dam starts to crack, if farmers finally realize that they've been scammed of their life's work by a bloviating self-serving idiot, there will be no saving Trump in 2020. Reality is a far more potent opponent than the Democrats. I just wish I knew if it was throwing its hat in the ring.