2024 was shaping up to be the year Congress regulated how kids engage with social media, particularly through one bill, the Kids Online Safety Act (KOSA). A debate about its risks to free expression still raged, but the voices of the bill’s advocates seemed to ring loudest in senators’ ears. The momentum was there. The Senate vote was virtually unanimous. Then, unexpectedly, House Republican leadership — worried KOSA would make Silicon Valley giants remove more conservative content —…