Donald TrumpDonald John TrumpFamily immigration detention centers could be at capacity within days: report Trump likely to meet with Putin in July: report DOJ requests military lawyers to help prosecute immigration crimes: report MORE in a new campaign ad paints Hillary ClintonHillary Diane Rodham ClintonTrump mocks 'elites' at campaign rally Trump backs down in rare reversal Election Countdown: Family separation policy may haunt GOP in November | Why Republican candidates are bracing for surprises | House Dems rake in record May haul | 'Dumpster fire' ad goes viral MORE as unfit to protect the country, using footage of her stumbling into a van when she fell ill at a 9/11 memorial ceremony in New York.

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After listing crises in the world, the spot cuts to footage of Clinton, the Democratic presidential nominee, falling while walking up stairs, coughing during her 11-hour testimony to the House Benghazi Committee, and stumbling as she was led into her van outside of the 9/11 event. 

"Hillary Clinton failed every single time as secretary of State. Now she wants to be president," a narrator says over the footage.

"Hillary Clinton doesn't have the fortitude, strength or stamina to lead in our world. Don’t let her fail us again."

Trump and his allies have long floated conspiracy theories about Clinton's health, and the Republican presidential nominee recently mocked her for what the Clinton campaign said was dehydration while she was suffering from pneumonia. The Clinton campaign didn't reveal she had pneumonia until after the 9/11 event — days after she had been diagnosed.

Trump has taken a no-holds-barred approach in the wake of a leaked 2005 video in which he talks about groping women without their consent.

He's especially ratcheted up the attacks on Clinton, inviting three women to Sunday night's presidential debate who accused her husband, former President Bill ClintonWilliam (Bill) Jefferson ClintonThe case for a ‘Presidents’ Club’ to advise Trump After FBI cleared by IG report, GOP must reform itself Bill Clinton hits Trump administration policy separating immigrant families in Father's Day tweet MORE, of sexual harassment or assault. Hillary Clinton represented a fourth Trump guest's alleged rapist while working as a lawyer.

And the ad comes hours after Trump tweeted on Tuesday, "It is so nice that the shackles have been taken off me and I can now fight for America the way I want to."

— This report was updated at 12:58 p.m.