Runoff in costliest House race is Tuesday.

DORAVILLE, Ga. — Dr. Nadine Becker wasn’t politically involved until she saw Donald Trump elected president, but the suburban Atlanta gynecologist didn’t know how to engage, given her traditionally Republican surroundings.

“I was yelling at the TV and throwing things at the TV,” said the 55-yearold mother of three. Then she found her cause in 30-year-old Democrat Jon Ossoff, who is seeking a major upset in Georgia’s Sixth Congressional District runoff Tuesday against Republican Karen Handel.

With a potential price tag exceeding $50 million, the most expensive House race in U.S. history has become a proxy for the nation’s political divides, offering another early test for Trump and the GOP’s monopoly in Washington. And it gives Democrats a chance to prove they can flip at least 24 GOP-held seats and reclaim a House majority in the 2018 midterm elections.

“My values are being threatened,” Becker said, mentioning health care access, abortion rights and voting rights, “and now we have something we can do.”

Business owners Brian Sleeth and Dave McCleary are equally appalled, but for reasons that leave them backing Handel.

“This is about who will support Donald Trump and his agenda,” says Sleeth, a 37-year-old landscaper from Johns Creek. “Karen Handel says she will, and we look forward to holding her accountable.”

The seat opened in February when Republican Tom Price resigned it to become Trump’s health and human services secretary.

The candidates have generally aligned with their national parties on policy. Handel says she’d have voted for the House GOP health care bill; Ossoff says he’d have opposed it. She broadly endorsed Trump’s loose outlines for tax cuts; he’s said any plan must be “fiscally responsible.” He supports a higher minimum wage, with caveats; she’s opposed.

For Handel, Ossoff ’s “values are 3,000 miles away in San Francisco,” the home of House Democratic leader Nancy Pelosi.