The long term effects of authoritarians consolidating their power and eliminating the last remnants of democracy and the rule of law is that it no longer matters if any of us are left or right. I'll take having a system that can still be changed over being trapped in under dictatorial rule but taking comfort in the fact that I've remained ideologically pure.

And no, choosing the best viable candidate doesn't just lead inevitably to a shift to the right. If that were the case, we wouldn't be talking about people on the right endorsing someone to their left. The fact that Democrats have chosen electable candidates when Republicans chose Trump loyalists and MAGA nutcases is the main reason why Republicans have underperformed since 2018, and why they keep sabotaging their own efforts fighting with their own party members. Their most recent victories are largely due to courts they packed with right wing judges, something that will only get worse if they win, but which will be gradually undone if they lose.

But this is an argument that's always raging on this site. That particular dead horse has been reduced to a fine paste. I doubt anyone's going to be swayed at this point.