Anonymous. (2026). [dryrun-2026-05-04] Confounding factors—including pre-existing homophily, cable-television exposure, partisan elite polarization, and demographic sorting—do not fully account for the observed growth in affective polarization, leaving room for algorithmic effects. Isonomia. https://www.isonomia.app/a/2wcv3JNR@3ab7e162ce81a5dcc7235797d7a3745bc370f90a4ee2a3059fc58923986a61fd