Donald Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE on Friday escalated his personal attacks on Hillary Clinton Hillary Diane Rodham ClintonBiden leads Trump by 36 points nationally among Latinos: poll Democratic super PAC to hit Trump in battleground states over coronavirus deaths Battle lines drawn on precedent in Supreme Court fight MORE, calling her a "monster" and "unstable" at a series of Friday campaign events.

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"Unstable Hillary Clinton, lacks the judgment, temperament and moral character to lead this country — and I believe that so strongly," Trump said at a rally in Des Moines, Iowa, according to CNN.

"She's really pretty close to unhinged, and you've seen, you've seen it a couple times. The people in the background know it, the people who know her know it, and she's like an unbalanced person."

The GOP presidential nominee called his rival a dangerous pathological liar and warned voters Clinton would lead to "the destruction of this country from within."

"The legacy of Hillary Clinton: death, destruction, chaos and weakness," Trump said. "She's weak. She's a weak person. I know her. She's a weak person."

He upped his rhetoric even further at another Friday campaign event in Green Bay, Wis.

"In one way, she's a monster," Trump said. "In another way, she's a weak person. She's actually not strong enough to be president."