With several 2020 presidential hopefuls unveiling their climate plans this week, Democrat Joe Biden released his own ambitious proposal, but it made headlines for the wrong reasons.
The former vice president's USD 1.7 trillion plan, which seeks net-zero emissions by 2050, quickly faced criticism for including unattributed passages lifted from other organizations' previously published documents, drawing fire from President Donald Trump.
Biden's campaign called the incident an error that was swiftly corrected.
"Several citations were inadvertently left out of the final version of the 22-page document," Biden's campaign said in response to the accusations.
"As soon as we were made aware of it, we updated to include the proper citations." Biden, who holds a commanding lead in the crowded 2020 Democratic field, is no stranger to plagiarism accusations.
The latest incident recalled his unattributed use of passages from a speech by British politician Neil Kinnock that helped drive Biden from the Democratic nomination race in 1988.
Josh Nelson, vice president of progressive group CREDO, first flagged the resemblances on Twitter.
But Trump quickly pounced, tweeting Wednesday that the "plagiarism charge against Sleepy Joe Biden on his ridiculous Climate Change Plan is a big problem."