A CNN poll expert on Wednesday night flagged what he called "a bit of a warning sign" in a key battleground state that could decide the election.
John King, an anchor and chief national correspondent for CNN, joined Anderson Cooper on his "AC360" to discuss a poll of likely voters showing Vice President Kamala Harris up by 6 points in Wisconsin and 5 points in Michigan — but tied with former President Donald Trump at 48% in Pennsylvania.
King initially said the polls were "largely positive" for the Harris campaign.
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"They show competitive races in all three of these blue wall states," he said, noting Joe Biden flipped all three in 2020 from red to blue.
"The blue wall states have mattered, have been decisive in the last two presidential elections," he added.
But King later said there are "some concerns" for the Harris campaign "if you look in the weeds of these polls." He pointed to her polling among Black voters in Pennsylvania and Michigan but said she's seen "good numbers" in suburban areas.
Harris was polling at 83% and 76% in Michigan and Pennsylvania, respectively, among Black likely voters. Biden was at 92% in both states four years ago.
"[She's] running significantly behind Biden in 2020," said King, noting the Harris campaign doesn't believe the polls will reflect what happens on Election Day.
King then focused on Philadelphia County and it's roughly 740,000 votes cast in 2020, noting Biden won it with 81.4 percent of the vote.
"If you want to win Pennsylvania as a Democrat, you need to do that, but not just the 80% — you need the high turnout," he said.
Biden won Pennsylvania by 80,000 votes, largely on the back of a "giant margin in Philadelphia" that helped off-set Trump's dominance in the rural areas, King added.
"That is a bit of a warning sign in Pennsylvania," he said.
In Michigan, a similar story played out in 2020, with Biden winning the state with a hefty margin of 68% in Wayne County.
Watch the clip below or at this link.