Of note, there is another amendment in a somewhat similar position, the Equal Rights Amendment: “Equality of rights under the law shall not be denied or abridge

Of note, there is another amendment in a somewhat similar position, the Equal Rights Amendment: “Equality of rights under the law shall not be denied or abridged by the United States or by any state on account of sex.” It's one state shy of passing and has been that way since the '80s. That said, there's a very strong argument that the amendment is no longer eligible to be passed because, unlike Madison's amendment, there was an explicit "this offer expires" date in the bill passed by Congress, and that date has long passed. Also, several states rescinded their ratifications. That said, there are plausible legal theories that states aren't actually allowed to un-ratify amendments and that proposed amendments can't expire.