A backlash to Trump and demographic changes in the Grand Canyon State have led to a tight race between two congresswomen for what used to be a safe Republican seat. The contest could give Democrats their first Senate win here since 1988, and one that's essential if the party has any hope of seizing a majority in the chamber.

The Democratic candidate, Kyrsten Sinema, has an unlikely profile. A former Green Party activist who's evolved into a moderate Democrat, she's making a bid for the center -- and for some Trump voters -- with a strategy of focusing on issues such as protecting health care access and improving education.

"This race is about Arizonans, not party politics in Washington," said Sinema, 42. "I've never been afraid to buck my party to get things done for our state."

Republican Martha McSally has had her own evolution. She refused to endorse Trump in 2016 as she has represented a Tucson-area swing district, but cozied up to him during her Senate primary this year en route to defeating two hard-right rivals. Now she's emphasizing her party affiliation to juice voter turnout.