PHILADELPHIA — Hillary Clinton Hillary Diane Rodham ClintonBiden leads Trump by 36 points nationally among Latinos: poll Democratic super PAC to hit Trump in battleground states over coronavirus deaths Battle lines drawn on precedent in Supreme Court fight MORE can celebrate the end of the Democratic National Convention by toasting a $1 million contribution from one of the most important Democratic donors in Philadelphia.

Mel Heifetz, a real estate investor and one of the most generous supporters of gay rights causes in the country, is sending a huge signal by putting his support behind the Democratic presidential nominee.

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"I don't want to see our country taken apart by [Donald] Trump," Heifetz told The Hill, in an interview at an inn nearby one of his properties in downtown Philadelphia.

Heifetz is a diehard Obama guy, and he says he's proud to have been the No.1 gay donor in the country for the president's reelection in 2012.

"She said, 'Good, now look at the camera.' I thought, 'Did I say the wrong thing?' " Heifetz said, laughing.

"I really feel that way. I just really love the guy. I get very emotional just talking about him."

Heifetz made headlines when he gave $1 million to the pro-Obama super-PAC Priorities USA during the 2012 campaign.

Heifetz was never especially excited by Clinton this campaign cycle, which is what makes his contribution so significant.

Such a large check — it will be among the biggest contributions in the country — sets an example for other lukewarm mega-donors to follow.

Heifetz keeps a low profile, but he's connected to some of the top Democratic donors in the country.

He says he's been told by the Democratic National Committee that his $1 million will be divided among groups supportive of Clinton. He doesn't know all the details yet, but he wrote an email to a large group of wealthy friends encouraging them to join him in backing Clinton.

The specter of Trump, the Republican presidential nominee, is a huge motivator for Heifetz.

He says if Trump wins in November, he'll sell all his properties and move somewhere else, maybe Asia.

Heifetz says he's not kidding.

"I am going on a trip following the election," he said.

"It's either going to be a joyful trip with a bunch of friends or it's going to be a trip that'll seem like a wake."