Donald TrumpDonald John TrumpChanges in policies, not personalities, will improve perception of corruption in the US Union leader: Bloomberg can go all the way Pelosi: 'I'm not counting Joe Biden out' MORE is giving Bernie SandersBernie SandersWarren highlights work with Obama, Harry Reid in new Nevada ad Union leader: Bloomberg can go all the way Biden on Univision: Deporting 3 million 'was a big mistake' MORE credit for helping him come up with lines of attack on Hillary ClintonHillary Diane Rodham ClintonUnion leader: Bloomberg can go all the way Will Bernie have to turn on his bros? De Blasio endorses Sanders for president MORE.

Trump, the presumptive GOP presidential nominee, on Friday said Sanders has come up with some strong attacks on Clinton.

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“Hillary is a disaster, folks,” Trump said at a rally in Fresno, Calif. 

“She has bad judgment, that was said by Bernie Sanders. He’s given me a lot of my best lines. I mean, he has given me such great lines on her.”

Trump added that he uses Sanders’s attacks against Clinton because critics accuse him of being “not nice” when he comes up with his own.

Clinton has a big lead on Sanders in the Democratic presidential race, but Sanders has insisted he won’t leave the race until the Democratic National Convention this summer.