ROLF, you and I don’t actually disagree.
What can’t be “undone” is the poisoning of the political well by the left in that we no longer have a two party system in which, by and large, both parties could, from time to time, pull together for the good of the country.
That has been over for some time and just becomes more apparent. The Democrats care for nothing but their power. They can’t be worked with or trusted at all, ever. That is what can’t be undone.
It is too late to solve the problems we face politically. The country has been split into two camps over issues and world views that cannot be compromised. Just as the in 1850s, we are heading for war.