What could Democrats have gained if they played the same sort of "hardball" in recent decades? [View all]

Just reading a story about Mitch Mcconnell and I find myself wondering what we could have gotten in the modern era (define as you like) if we played the same way? Anything short of and up to outright illegality is a valid tactic. Norms, decorum, standards be damned...

A la blocking the Supreme Court seat etc...

This would be setting aside the incredible damage that blowing up norms does of course...