Arizona primary shadowed by death of McCain

  • In this Tuesday, Aug. 21, 2018 photo, U.S. Senatorial candidate U.S. Rep. Kyrsten Sinema, D-Ariz., speaks with the media after volunteering at a food pantry in Phoenix. Sinema is the democratic nominee seeking the seat of retiring U.S. Sen. Jeff Flake, R-Ariz. in a race against U.S. Rep. Martha McSally, R-Ariz. (AP Photo/Matt York)

  • Florida Gubernatorial candidate Gwen Graham, left, interacts with Georgina Morgan during a visit to Versailles Restaurant on Tuesday, Aug. 28, 2018, in Miami. (Roberto Koltun/Miami Herald via AP)

  • In this Wednesday, Aug. 22, 2018 photo, U.S. Senatorial candidate U.S. Rep. Martha McSally, R-Ariz., stands at the international border with Mexico, with ranchers Jim Chilton, left, Ted Noon, center, and Tom Kay, right, south of Arivaca, Ariz. In her bid to become the Republican Senate nominee, McSally has tacked hard right after initially keeping her distance from President Donald Trump. (AP Photo/Matt York)

  • In this May 2, 2018 file photo, Arizona Republican U.S. Senate candidate Kelli Ward speaks to the media as she prepares to file her nominating petitions at the state Capitol in Phoenix. Ward, running for her party’s nomination for an open Senate seat, suggested the announcement that McCain was ending medical treatment was intended to hurt her campaign hours before Sen. John McCain died on Saturday, Aug. 25. (AP Photo/Bob Christie, File)

PHOENIX — Arizona voters were nominating candidates Tuesday to replace one of President Donald Trump’s fiercest critics in the Senate, a primary contest amid increasing political change in a closely watched political battleground.