A high-profile fundraiser for the victims in Saturday's assassination attempt on former President Donald Trump at a Pennsylvania political rally has raised over $4 million, with top donors including Dana White and Kid Rock.

The GoFundMe, which says it is "President Trump authorized" is organized by Meredith O'Rourke, who is also Trump's top finance person, and is raising money for those "wounded or killed" from the shooting at the Trump rally in Butler on Saturday.

The GoFundMe's initial goal was to raise $1 million, but it has far surpassed that goal, raising over $4 million from over 54,000 donations as of Monday afternoon.

Firefighter Corey Comperatore killed, 2 others injured in rally shooting

One spectator, Corey Comperatore, was killed and two others were critically injured during the assassination attempt. Trump is recovering after he was injured in the right ear when a gunman opened fire with an AR-15-style rifle on a rooftop about 400 feet outside the rally.

The gunman, identified Sunday by the FBI as 20-year-old Thomas Matthew Crooks, was killed by law enforcement officials moments after he opened fire.

Comperatore, a firefighter from Sarver, Pennsylvania, had two daughters and was an avid Trump supporter.

"Yesterday time stopped," Allyson Comperatore, his daughter, said on Facebook. "And when it started again my family and I started living a real-life nightmare."

Two men injured in the shooting – a 57-year-old New Kensington, Pennsylvania, resident and a 74-year-old resident of Moon Township – were in stable condition on Sunday, according to an update from Pennsylvania State Police.

GoFundMe organized for Corey Comperatore's daughter, family

A GoFundMe aiming to raise $7,000 for Caomperatore's daughter, Allyson and his family after his death was launched Sunday.

It has since raised over $950,000 from more than 17,000 donations.

Who are the top donors to the O'Rourke GoFundMe?

Top donations so far for the O'Rourke GoFundMe include $50,000 from the conservative think tank The Heritage Foundation, $50,000 from American Hartford Gold, $50,000 from UFC CEO White and $50,000 from the singer Kid Rock.

Other large, notable donations to the fundraiser include $30,000 from former Republican presidential candidate Vivek Ramaswamy, $25,000 from the Scaramucci family and $15,000 from conservative pundit Ben Shapiro.

Who is Meredith O'Rourke, the GoFundMe organizer?

From Florida, O'Rourke has been a top political fundraiser for Republicans for decades, including for current U.S. Sen. Rick Scott's and former Florida Agriculture Commissioner Adam Putnam's campaigns for governor. She also did a short stint in 2015 for former N.J. Gov. Chris Christie's run for president.

Her LinkedIn profile lists her currently as "National Finance Director and Senior Advisor to Donald J. Trump For President 2024, Inc."

Contributing: Jim Rosica, USA TODAY NETWORK.