Biden campaign says his climate plan failed to cite sources

Joe Biden's presidential campaign is amending his climate policy plan because a handful of passages did not include citations for original sources of nearly identical language

Joe Biden's Democratic presidential campaign amended his climate policy plan hours after it was released Tuesday because a handful of passages did not credit some of the sources in the proposal.

The changes come after The Daily Caller, a conservative news outlet, reported that several passages from Biden's plan appeared to borrow from policy papers and statements written by outside groups without citation.

A Biden campaign statement says, "Several citations, some from sources cited in other parts of the plan, were inadvertently left out of the final version of the 22-page document."

Biden's 1988 presidential campaign ended amid controversy over plagiarized passages in his campaign speech and after he admitted plagiarism on a law school paper. At the time, Biden said the incident at Syracuse University was a matter of him not knowing the proper way to document sources.

President Donald Trump's reelection campaign wasted little time in trying to capitalize.

Yet David Axelrod, a Democratic strategist and architect of Obama's 2008 campaign, was skeptical that the errors in Biden's climate policy proposal will affect his front-running campaign.

"There are many, many molehills that look like mountains during a campaign," Axelrod said. "The challenge for the campaigns and the press is to decide which is which."

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Associated Press writers Thomas Beaumont in Des Moines, Iowa, and Zeke Miller in Washington contributed to this report.