From NYT (webpage archive, not link to NYT) -
Most stark may be Mr. Biden’s towering advantage among white women with college degrees, who support him over Mr. Trump by 39 percentage points. In 2016, exit polls found that group preferred Mrs. Clinton to Mr. Trump by just 7 percentage points. The poll also found that Mr. Biden has narrowed Mr. Trump’s advantage with less-educated white voters. [Emphasis added]The exodus of white voters from the G.O.P. has been especially pronounced among younger voters, an ominous trend for a party that was already heavily reliant on older Americans. [Emphasis added]
Fifty-two percent of whites under 45 said they supported Mr. Biden while only 30 percent said they supported Mr. Trump. And their opposition is intense: More than twice as many younger whites viewed the president very unfavorably than very favorably. [Emphasis added]
(hattip to John Binder @ Breitbart)
Sample sizes may not add to the total because some demographic characteristics of respondents are unknown.·Based on a New York Times/Siena College poll of 1,337 registered voters from June 17 to June 22.
Not likely voters, just "registered" -- and we know what that means in an age of motor-voter and mail fraud -- and the crosstabs are unknown.