Partial answer:
I think it is a hack, and such liable to have the Law of Unintended Consequences inflicted upon it, but a partial solution might be that
A sub-majority vote is required to bring a debate to the floor of the Senate.
A majority vote can close the debate except in the case of a filibuster in which case a supermajority is required to kill the filibuster first.
However that kind of falls out of the realm of a constitution and into that of the Senate setting its own rules. Is the filibuster enshrined in the US Constitution? Can\'t be, I suspect, otherwise the whole Nucelar Option malarky would just be so much toothless huffing.
Comments
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A sub-majority vote is required to bring a debate to the floor of the Senate.
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A majority vote can close the debate except in the case of a filibuster in which case a supermajority is required to kill the filibuster first.
However that kind of falls out of the realm of a constitution and into that of the Senate setting its own rules. Is the filibuster enshrined in the US Constitution? Can\'t be, I suspect, otherwise the whole Nucelar Option malarky would just be so much toothless huffing.