Investigating the Drivers of Electron Temperature Variations in H ii Regions with Keck-KCWI and VLT-MUSE by Rickards Vaught, RJ, Sandstrom, KM, Belfiore, F, Kreckel, K, Méndez-Delgado, JE, Emsellem, E, Groves, B, Blanc, GA, Dale, DA, Egorov, OV, Glover, SCO, Grasha, K, Klessen, RS, Neumann, J, Williams, TG