Sen. Bernie Sanders Bernie SandersButtigieg stands in as Pence for Harris's debate practice Bernie Sanders warns of 'nightmare scenario' if Trump refuses election results Harris joins women's voter mobilization event also featuring Pelosi, Gloria Steinem, Jane Fonda MORE (I-Vt.) will be in Arizona this week, stumping on behalf of Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonButtigieg stands in as Pence for Harris's debate practice Senate GOP sees early Supreme Court vote as political booster shot Poll: 51 percent of voters want to abolish the electoral college MORE.

The Vermont senator will hold rallies in Tucson and Flagstaff on Tuesday, the campaign announced Sunday night.

JUST IN: Bernie Sanders to visit Flagstaff and Tucson on Tuesday to campaign for Hillary Clinton. #abc15 pic.twitter.com/wpgEqAXEsV — ABC15 Arizona (@abc15) October 17, 2016

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Chelsea Clinton will be in Tempe, Ariz., on Wednesday to campaign on behalf of her mother.

Arizona is a typically red state that may flip this cycle; the RealClearPolitics average of polls in the state shows GOP nominee Donald Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE ahead by less than a point.

Trump’s campaign has not put much focus on the state. There are five staffers there, paid for by a combination of the campaign, the Republican National Committee and the Arizona Republican Party, NBC News reports.

"I think he's going to lose Arizona," GOP state operative Matthew Benson told NBC News. "Barring something unforeseen, Trump is going to lose Arizona, and you're still not seeing the type of activity you'd expect to see if he expects to save it."

The Clinton focus on Arizona comes after the Trump campaign effectively pulled out of Virginia and cut ties with the Ohio GOP chairman.

Arizona Sens. John McCain John Sidney McCainCindy McCain endorses Biden: He's only candidate 'who stands up for our values' Biden says Cindy McCain will endorse him Biden's six best bets in 2016 Trump states MORE and Jeff Flake Jeffrey (Jeff) Lane FlakeJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Republican former Michigan governor says he's voting for Biden Maybe they just don't like cowboys: The president is successful, some just don't like his style MORE, both Republicans, have been critical of the GOP nominee. McCain dropped his endorsement after audio of Trump from 2005 was released in which he brags about grabbing women without their consent.

Flake has long maintained that he won’t vote for his party’s nominee.