Hillary Clinton's campaign pointed to its success in polls among nonwhite voters and isn't worried if the Democratic nominee can't attract more support from white male voters who comprise a large part of GOP nominee Donald Trump's base.

"We're in even better shape than we were before the convention with every Obama coalition demographic. The proof is in the poll numbers," a Clinton surrogate said, according to The Hill.

An NBC/Wall Street Journal poll showed just 1 percent of black voters support Trump, and Clinton was in the lead among nonwhites by 69 percent to Trump's 17 percent.

Clinton was also in the lead — 47 percent to 40 percent — among white voters who have college degrees.

Trump maintains an advantage in one key category, though, The Hill reports: white working class voters who don't have college degrees (49 percent to 36 percent).

According to NPR, in the last presidential election, President Obama lost among white college-educated voters.

Political science professor Cal Jillson said Clinton must focus on the white working class, reports The Hill.

"It's important for her psychologically," Jillson said. "It's important for the Democratic Party to try and restore some of its messaging toward white middle class voters."

The Clinton campaign is not appearing to give up on those voters. Vice President Joe Biden, on the campaign trail for Clinton in Scranton, Pennsylvania, focused on working class white male voters.

"Hillary understands the hopes and aspirations of everyone in Scranton and Claymont and every Scranton and Claymont in America," Biden said, according to The Hill, referring to nearby city Claymont, Delaware, where he was raised.

"If you care about your job, decent pay, if you worry about your children's education, there's only one person in this election who will possibly help you. She's always been there. That's her life story," Biden said.

Biden's communications director Kate Bedingfield said the vice president plans to "speak directly to working families to make the case that Hillary is the candidate in this race who understands their lives," Bedingfield said.

The Washington Post reported Biden said Clinton is focused on the future for current voters.

"What Hillary is all about is making sure that every one of you can look your child, your grandchild, in the eye and say, 'It's going to be OK,'" Biden said.