Ron Barber

Arizona swing district features vacant seat, crowded primary

With acres of ranches, small southern border towns and most of populous Tucson, the landscape of Arizona's 2nd Congressional District is as varied as its swing seat electorate.

Just as varied is the field of candidates competing in this year's primary, where seven Democrats and four Republicans seek to succeed Republican Rep. Martha McSally. Her bid for U.S. Senate put the seat up for grabs, and it's a key pickup for Democrats who hope to take control of the House.

The Democratic candidates include former Congresswoman Ann Kirkpatrick, who represented another district then unsuccessfully challenged long-serving Sen. John McCain in 2016 — plus recurring candidate and...