Citizens’ deliberation and interest in politics are crucial to democracy and have always been understood as positively related. We argue here that political discussion, one of the most common mechanisms of deliberation, might lead to citizens’ political disengagement or lack of interest. Using the Comparative National Elections Project (CNEP), an innovative data set of postelection national surveys, we attempt to ascertain and shed light on these apparently contradictory effects on citizen engagement. The results indicate that political discussions, specifically those involving disagreements, can produce a lower level of interest when citizens are less informed, are strongly partisan, or hold strong social ties with those they disagree with.