Fast fashion is known to kick up all kinds of digital debate about overconsumption, environmentalism, designer knockoffs and other issues, but the latest kerfuffle is over Jennifer Hegseth’s choice of a Shein dress for Saturday’s White House Correspondents’ Association dinner in Washington, D.C. The back-and-forth about the ultra-cheap frock is a telltale sign of how political figures’ fashion choices are increasingly being scrutinized and celebrated by thousands on social media. However, it was not Hegseth, a former longtime Fox News executive and producer whose spouse Pete is the U.S. Secretary of War, who spread the word about her fashion choice. Parsons student Ella Devi cast the spotlight on Hegseth’s dress in a social media post, but by erroneously identifying it as a similar $20 one from another Chinese fast-fashion platform — Temu.…