This paper contains two major sections as follows: Section one is acritical review of the literature related to co-selection and lexical cohesion in political discourse in general, and political speeches related to COVID-19 in particular. Section 2 is dedicated to the linguistic theories that put the theoretical foundations of political discourse from the perspectives of lexicality and co-selection. The theoretical framework reviewed include critical discourse analysis according to van Dijk (1997) and (Fairclough (1993), lexical cohesion according to Allan & Burridge (2006), Halliday et al. (2014),  Schiffrin (1987) and  Widdowson (1973). Both sections explore how the two fields intersect to produce valuable insights into the study of language and literature as well.