A federal task force in the city has been targeting crime and undocumented immigrants since October. Observers say they have faced retaliation for trying to track the agents’ work.

© Brad J. Vest for The New York Times

Rampant gerrymandering and intense partisan sorting have shrunk the number of competitive House seats to a record-low. The political scientist Lee Drutman explains how on “The Ezra Klein Show.”

America’s two-party system isn’t an accident — it is a direct result of our electoral structure. The political scientist Lee Drutman tells the Opinion columnist Ezra Klein how shifting to proportional representation could pave the way for viable third parties and give voters more choices.

The political scientist Lee Drutman argues that we should switch to a system of proportional representation and put an end to our “trench warfare politics.”