Priorities USA Action, the major super PAC supporting likely Democratic nominee Hillary Clinton, is broadening its campaign against her Republican rival with a new generational appeal urging young voters to "Stop Trump/Stop Hate."

On Thursday, the group is launching a multimillion-dollar online campaign against Donald Trump, targeting millennials with digital ads and a "We Can Stop Hate" website with shareable images of the real estate developer's provocative tweets and a call for people to share acts of kindness. The site, which seeks to harness the social media networks of millennials, also encourages young people to register to vote and will offer branded merchandise.

The first ad of the campaign features 17-year-old Dante Latchman of Las Vegas, whose fight against a rare form of cancer left him disabled. He is seen sitting on the floor of a living room, watching news footage of Trump mocking a disabled journalist. "I don't want a president who makes fun of me," Latchman says. "I want a president who inspires me, and that's not Donald Trump."

The spot echoes the theme of a TV ad the super PAC began running this month in swing states featuring the parents of a young girl with spina bifida.

Priorities is spending $500,000 to run the new digital ad, called "Dante,” on Facebook, Instagram and Pandora in Ohio, Florida, Virginia, Nevada, Colorado, Iowa, New Hampshire and North Carolina until the Republican convention in July. An array of allied groups have partnered with the super PAC on the campaign and will roll out online videos aimed at their constituencies. They include Planned Parenthood Votes and Planned Parenthood Action Fund, the League of Conservation Voters Victory Fund, Latino Victory Fund, the American Federation of Teachers, LPAC, the Women Vote initiative by Emily’s List, PowerPAC.org, and the Human Rights Campaign.

The digital campaign is part of a $147 million television, radio and online blitz that Priorities has planned through Election Day, an effort that officials said could expand. The super PAC raised more than $88 million by the end of May and says it has $45 million more in commitments.

So far, there has not been a well-funded independent effort supporting Trump, who is backed by at least five super PACs that are jockeying over donors. But that could be changing: billionaire hedge-fund magnate Robert Mercer has converted a super PAC he funded with $13.5 million to back Sen. Ted Cruz in the GOP primaries into an anti-Clinton group now registered as Make America Number 1. The group, which will go by the name Defeat Crooked Hillary PAC, is being led by David Bossie, president of the conservative advocacy group Citizens United, as BloombergPolitics first reported.