Lisa Lerer, a national political correspondent, travels to a cattle auction in Calhan, Colo., to see if economic anxieties are affecting the loyalty of rural voters to the Republican Party.

The homeland security secretary, Markwayne Mullin, has repeatedly said ICE agents are pursuing “the worst of the worst” criminals. But as Hamed Aleaziz, a reporter for The New York Times, explains, data shows that arrests of people with no criminal record have soared this summer.

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.