Gilbert, Ariz. • Former Republican presidential nominee Mitt Romney is expected to be in Arizona to stump for GOP Senate candidate Martha McSally.

The practicing Mormon is set to appear at a McSally rally on Friday afternoon in the Phoenix suburb of Gilbert, which is a heavily Mormon area.

McSally is in a tight race with Democrat Kyrsten Sinema. Both congresswomen are vacating their positions to run for Sen. Jeff Flake's seat.

Flake opted not to run for re-election.

The rally comes just days after early voting began in Arizona.