In Pennsylvania, four congressional districts exemplify the types of seats that Democrats are aiming to flip. Our national political correspondent Shane Goldmacher explains.

Our reporter Nick Corasaniti interviewed elected officials from across the political spectrum on what it’s like to live and work with threats of political violence.

Our investigative reporter David A. Fahrenthold explains his investigation into 10 planes the Department of Homeland Security bought from a donor to former D.H.S. Secretary Kristi Noem.