Diversity, Equity and Inclusion (DEI) initiatives became an almost overnight transformational success in academia beginning one or two years ago (in the US and several other countries such as Canada and the UK). The most visible change is perhaps the introduction of Diversity Statements as a required document to be submitted by every applicant (faculty and graduate applications). See for example here for Berkeley's requirement from applicants to describe past experience or background that made them "aware of challenges faced by historically underrepresented populations". This caused concerns (justified or not) by some academics who claim that diversity statements serve as a political litmus test for new faculty, while some other groups of scholars argued that DEI as a practice and as a goal in itself (e.g., equity) is essentially unethical because it treats individuals as part of a group (i.e., group-identity) instead of individuals independent of their supposed group (e.g., women, ethnic groups, LGBT).
Question: Regardless of the arguments for or against DEI, has there been any example of initiative by academics that succeeded to revert DEI practices, and specifically in preventing the implementation of mandatory diversity statements?
Edit: I have decided to accept Ben's answer because it is the closest to a publicly known attempt (on legal basis) to tackle DEI initiatives. Other, more local and non-public successes in pushing back against DEI were mentioned by Paul Garrett, but these are as mentioned not public, and lack clear organization as it seems. Ian Sudbery also had a good example, but it seems it was unsuccessful eventually.