Ohio Democrat Sherrod Brown is facing déjà vu as he stares down the massive war chest assembled by cryptocurrency groups determined to stop the former senator from getting his old job back.

Once one of crypto’s toughest Capitol Hill critics, who accused digital assets of operating as a gateway to illegal activity and harming consumers, Brown has quietly adopted a muted go-to response on the campaign trail as he seeks to topple a crypto-friendly rival, Sen. Jon Husted (R-OH).