Why We're Polarized

by Ezra Klein

In 1990, in a paper entitled “The Perils of Presidentialism,” Linz explained why. The “vast majority of the stable democracies” in the world were parliamentary regimes, where whoever wins legislative power also wins executive power.9 America, however, was a presidential democracy: the president is elected separately from the Congress and can often be at odds with it. This system had been tried before. America, worryingly, was the only place where it had survived. The problem is straightforward. In parliamentary systems, the prime minister is the leader of the coalition that controls the legislature. If that coalition loses an election, it loses power. But at any given moment, only one party or coalition holds power. In presidential systems, by contrast, one party can control the legislature and another can control the presidency. Both parties, then, have a claim to democratic legitimacy. “Under such circumstances,” asked Linz, “who has the stronger claim to speak on behalf of the people: the president or the legislative majority that opposes his policies?” It gets worse. What happens when the majorities that the president and the Congress represent are different majorities, who voted at different times and through different methods?