Before revision:  Following the seminal work of Downs (1957)  , we assume that voters are rationally inattentive and can process information about candidates' random policies at a cost proportional to entropy reduction as in Sims (1998) and Sims (2003). Two salient patterns emerge in equilibrium as we increase the attention cost or garble the news technology : first, arousing and attracting voter' s attention becomes harder;
After revision:  Following the seminal work of Downs (1957) , we assume that voters are rationally inattentive and can process information about candidates' random policies at a cost proportional to entropy reduction . The main finding is an equilibrium phenomenon called attention- and media-driven extremism, namely as we increase the attention cost or garble the news technology : first, arousing and attracting voter' s attention becomes harder;