The leading super PAC backing Hillary Clinton for president released an ad Thursday targeting Donald Trump's treatment of disabled people.

The 30-second ad from Priorities USA features a boy named Dante who was diagnosed with a rare form of cancer on his spine that disabled him when he was one year old.

In the ad, Dante alludes to Trump's apparent mockery of a reporter from The New York Times with a physical handicap at a rally in South Carolina last November, and it shows a clip of Trump imitating him.

"I don't want a president who makes fun of me," Dante says. "I want a president who inspires me."

The ad is a $500,000 buy that is aimed at millennials, Priorities USA said, and it will air on Facebook, Instagram and Pandora in a number of battleground states including Ohio, Virginia, Colorado, Florida and North Carolina. It will air from Thursday until the Democratic National Convention in Philadelphia next month.

It's also part of a multi-million dollar "Stop Trump/Stop Hate" campaign that the group is launching.