Republican presidential candidate Donald Trump went after Democratic rival Hillary Clinton on Friday for highlighting his treatment of a former Miss Universe.
"Using Alicia [Machado] in the debate as a paragon of virtue just shows that Crooked Hillary suffers from BAD JUDGEMENT! Hillary was set up by a con," Trump wrote in a series of tweets.
Clinton pointed to 1996 pageant winner Machado in the first presidential debate on Monday to stress Trump's poor treatment of women, noting Trump had belittled her after she gained weight.
The Clinton campaign has highlighted Machado, a Venezuelan who recently became a US citizen, all week as it paints Trump as a misogynist.
Trump in a series of tweets on Friday alleged Machado had a checkered past and suggesting Clinton had been "duped".
"Did Crooked Hillary help disgusting (check out sex tape and past) Alicia M become a US citizen so she could use her in the debate?" he wrote without backing up his allegation.
Clinton took Trump to task for the series of early morning tweets, asking on her own Twitter account, "What kind of man stays up all night to smear a woman with lies and conspiracy theories?"
She also tied the remarks to his temperament that she has alleged shows he is unfit to be president.
"When something gets under Donald's thin skin, he lashes out and can't let go. This is dangerous for a president," she said.