It’s a procedural rule, yes it can be put back in place if Republicans want to, they don’t, but it can be. This is because it has no law associated with it, no bill to pass, it’s something the Senate made up to stall civil rights and especially keep brown senators in the 1800s from doing anything the extreme white minority didn’t want.

It’s not a ‘nuclear option,’ it’s a return to how the country was designed to function and did function for more than a century.