Progressives often support diversity mandates as a path to equality and a way to level the playing field.
(1) Progressives 在此句中做名词,表示“进步人士”,level在此句中做动词,表示“使相等”。
(2) support A as B 相当于regard A as B, 表示“把……当做……”
(3) to equality是a path 的后置定语,to level the playing field是a way的后置定语
(4) 本句译文:进步人士往往支持多元化规定,将其当做是通向平等的道路和创造公平竞争环境的途径。