The Republican National Committee piled on ex-veep Joe Biden on Wednesday after revelations that parts of his climate platform had been cribbed from other sources.

“Joe Biden has been plagiarizing for longer than I’ve been alive,” RNC chairwoman Ronna McDaniel said on Fox News.

During Biden’s ill-fated 1988 presidential campaign, controversy exploded over plagiarized passages in one of his campaign speeches and plagiarism on a law school paper.

The firestorm led to him leaving the race, which the RNC was all too happy to remind him of.

“This is not Joe Biden’s first brush with plagiarism,” the RNC’s Steve Guest tweeted.

“During his 1988 campaign, Biden plagiarized campaign speeches from British Labour Party leader Neil Kinnock as well as Robert Kennedy. During law school, Biden plagiarized, too.”

President Trump, tweeting from Europe, drew attention to the story Wednesday and called it a “big problem.”

“Plagiarism charge against Sleepy Joe Biden on his ridiculous Climate Change Plan is a big problem, but the Corrupt Media will save him. His other problem is that he is drawing flies, not people, to his Rallies. Nobody is showing up, I mean nobody. You can’t win without people!” Trump tweeted.

Meanwhile, Biden leads Trump in the key state of Texas by 49 to 44 percent, a new Quinnipiac poll said Wednesday.