U.S. Senate rivals Martha McSally and Kyrsten Sinema appeared face to face on Oct. 15 in the only debate in their contentious race to replace retiring Sen. Jeff Flake.

Polls have shown the race to be close. Sinema led McSally in a recent Suffolk University/Arizona Republic poll by 3 percentage points, but the poll's margin of error was plus or minus 4.4 percentage points.

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