Dr. Anamaria Dutceac Segesten, Associate Professor in Strategic Communication at Lund University, joins a discussion of cross-cutting expression and its implications for digital campaigning on Facebook. On the theory side, we discuss concepts of online self-expression and cross-pressures. We also discuss how political ideology can be inferred from Facebook reactions such as 'likes' and 'loves'. Finally, we discuss what topic models of the Brexit debate around Facebook can reveal about how and what Facebook users discussed around the referendum.