Politico: “I am not there to campaign for any particular candidate in this particular trip,” he said. ... Sanders similarly batted away a question about Rep. Kyrsten Sinema, the Democrat running to replace retiring Republican Sen. Jeff Flake. “My thought is none. I’m there for two congressmen who are progressives,” Sanders said. “I’m not there on any Senate effort.”

AZCentral: Rep. Kyrsten Sinema enters Senate race, hoping to unseat Jeff Flake

So far this year, Sinema has voted in line with the Trump administration's known preferences 49 percent of the time, according to the website FiveThirtyEight. By that measure, she is the third-most GOP-friendly Democrat so far this year.

By contrast, Flake has voted with the administration 92 percent of the time. Seven of the other 51 Republicans in the Senate have lower marks, including Sen. John McCain of Arizona.

Sinema's proudest legislative accomplishment to date is passage last year of a measure to require the VA to accommodate veterans needing mental health assistance, even if their work involved classified information that needs special handling. It is named for Daniel Somers, a Phoenix Iraq War veteran who said he killed himself after hitting roadblocks with the VA.

... While Sinema has frequently supported the current GOP agenda, she did not vote for the health-care reforms that are arguably the most divisive and high-profile legislation of the Trump era. ...

https://www.azcentral.com/story/news/politics/arizona/2017/09/28/rep-kyrsten-sinema-enters-senate-race-hoping-unseat-jeff-flake/609555001/

The congresswoman who grew up in a gas station
https://www.azcentral.com/story/news/arizona/politics/2016/01/30/congresswoman-who-grew-up-gas-station/79206952/

WSJ: Can a Onetime Nader-Supporting ‘Bomb Thrower’ Win Arizona’s Senate Seat? Democrats Hope So. Rep. Kyrsten Sinema, the likely nominee is trying to transform herself into a conservative Democrat by being a semi-reliable supporter of the president
https://www.wsj.com/articles/democrats-road-to-the-senate-runs-straight-through-trump-country-1520266957

Elle: America's Most Colorful Congresswoman: Kyrsten Sinema https://www.elle.com/culture/career-politics/a12563/arizona-congresswoman-kyrsten-sinema-profile/

Sinema's first attempt at the state legislature—while she was in law school—was a failure. "I was not a Democrat; I was an independent," she says. "Here's the thing: You can't win that way. But I didn't know that." Undeterred, Sinema reregistered as a Democrat, and the next election she won. At 28, she was Arizona's youngest lawmaker; she took the bar exam her first month in office.

In one of the more conservative statehouses in the country, Sinema was ready, as she puts it, "to face off for justice." Bills she considered "travesties"—such as draconian immigration laws and abortion restrictions—would pass with supermajorities, despite her fiery floor speeches. When legislation was pending to ban women from selling their eggs, Sinema took to the floor to say, "You keep your hands off my eggs, and I'll keep my hands off your sperm."

"When she first came in, she'd just kind of say how she felt," Lujan says. "But at times that hindered her ability to accomplish things." Sinema realized, she says, that she'd worked herself into a "lonely corner." She softened her tone and started joking around with members of the opposite party. But she stuck to her progressive beliefs, racking up awards from such groups as Planned Parenthood and the Sierra Club. Sinema marched for immigrants' rights, and when undocumented students couldn't afford a permit to hold a public rally for the DREAM Act, she put up her own cash to help them. In her spare time, she returned to ASU to earn her PhD in social work, adding "Dr." to her growing list of titles. Sinema first started getting national attention in 2008, when she led a diverse coalition that defeated a ballot initiative that would have outlawed gay marriage.