I think we will see October 2019 as the beginning of the end. The situation has been unsustainable since 2016. Unfortunately the problems are far larger than the failure of the US as a viable state. The collapse of the republic into fascist corruption with a mentally debilitated criminal at the top will be seen as sadly humorous.
We simply don’t know yet what this end will be. It will be the end of Trump and the Republican Party and the end of the US as we know it but in what way or sequence is still hidden.