The use of the word ‘radical’ by these Republicans is grimly interesting and perverse, since I associate this mammalian definition of gender with a subset of radical feminism (the RF in TERF). They presented the idea as liberating (in the sense that since your gender has already been singly defined by your reproductive role, everything else - e.g. your name / job / hobbies / how you present yourself - was irrelevant, and no-one should be able to use any of those to question your gender). I very much doubt that these measures by US politicians will ultimately be liberating for anyone though, since trans people are just the first on a list. (It’s not like no-one warned the ‘gender critical’ gang about who they were cosying up to)
(that link needs the ‘https’ part in to work)