Historically, the Senate, measured and collegial, and per the 60 vote rule, served as a check ‘n balance amidst the never ending ebb and flow of US political power.
Mitch has been incredibly destructive to that institution, albeit not quite Donald Trump level of destruction. Whether or not you place the blame elsewhere, what happens when the Democrats have majority? Are they forced to retaliate? Are they forced to deliver payback? And then when the GOP resumes majority, then they pay it back fivefold?
And on and on ...
Big huge scorched earth swings of the political pendulum, all the way left, then all the way right, and on and on ...
Something to think about.