State media tagging does not affect perceived tweet accuracy: Evidence from a U.S. Twitter experiment in 2022

State media outlets spread propaganda disguised as news online, prompting social media platforms to attach state-affiliated media tags to their accounts. Do these tags reduce belief in state media misinformation? Previous studies suggest the tags reduce misperceptions but focus on Russia, and current research does not compare these tags with other interventions. Contrary to expectations, a preregistered U.S. experiment found no effect of Twitter-style tags on belief in false state media claims, seemingly because they were rarely noticed. By contrast, fact-check labels decreased belief in false information from state outlets. We recommend platforms design state media tags that are more visible to users.