“…The more strongly people identify with the ingroup, the more motivated they are to differentiate between ingroups and outgroups (Mackie, 1986; Mullen, Dovidio, Johnson, & Copper, 1992; Turner et al, 1987). Self-categorization thus implies that the strength of individuals' partisan identification may be associated with greater perceived political polarization (Abrams & Hogg, 1988; Ellemers, Spears, & Doosje, 2002; Huber, Van Boven, Park, Teixeira, & Pizzi, 2012; Jetten, Spears, & Postmes, 2004; Sherman, Hogg, & Maitner, 2009; Westfall, Chambers, & Van Boven, 2012).…”