From a New York Times story by Nate Cohn headlined “Why Biden Is Behind, and How He Could Come Back”:

Four years ago, Joe Biden was the electability candidate — the broadly appealing, moderate Democrat from Scranton who promised to win the white working-class voters who elected Donald J. Trump.

There are few signs of that electoral strength today.

In a new set of New York Times/Siena College polls, Mr. Trump leads Mr. Biden in five of the six battleground states likeliest to decide the presidency, as widespread discontent with the state of the country and growing doubts about his ability to perform his job as president threaten to unravel the diverse coalition that elected him in 2020.