The Supreme Court of the United States has expressly recognized that a state legislator has a federal cause of action to challenge actions by the state legislature that dilute or render nugatory the legislator’s vote. In Coleman v. Miller, 307 U.S. 433, 438 (1939)... From their brief. The legislators' votes are being diluted and rendered nugatory. Hence fed action. Prec listed. But it is not clear to me that their votes are being diluted by the "legislature".
Nugatory....I had to look that one up!
You do not think that a state legislator's vote is being nullified when, instead of his vote not to approve a specific tax hike provision meaqning that fully 2/3 of the other legislators have to approve the provision, it is now the case that only 51% of his legislative colleauges are needed to overcome his vote of his oppostion to the tax hike. That is clearly nullification, or at least dilution of his vote, by action of the legislature passing the tax hike provision with only 51%. The significance of his NO vote has been diluted and nullified--by the legislature voting ot pass the tax hike by majority vote contra the 2/3 requirement ofthe constitution.
This is self-evident to me.