For nearly a century, state regulators played an important role in telecommunications regulation. The 1934 Communications Act gave the Federal Communications Commission authority to regulate interstate telephone service, but explicitly left intrastate calls—which comprised 98% of Depression-era telephone traffic—to state public utility commissions. By the late 2000s, however, as landline telephony faded to obscurity, scholars and policymakers alike recognized that the era of comprehensive state telecommunications regulation had largely come to an end.Perhaps surprisingly, however, the first years of the Trump Administration have seen a resurgence in state telecommunications regulation—driven not by state institutional concerns, but by polic...